Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 28-04-2019, 04:05   #1
Registered User

Join Date: Apr 2019
Boat: Bruce Roberts Spray 36 pilothouse
Posts: 32
Repainting my steel boat

Hi, looking for some advice!

I’m about to do the bottom paint on my steel boat, the pervious owner isn’t sure what bottom paint is currently on but he said he was going to sand to roughen it up, red lead it and then antifoul. Does this sound right? Any suggestions?



On top,

Any suggestions on how to go about repainting the top?

I’m a total newbie and finding it hard to find the right question to ask to get the right answer

Thank you
Attached Thumbnails
Click image for larger version

Name:	F124811E-00AF-4DEE-BBBD-BF453D2957D6.jpg
Views:	213
Size:	411.4 KB
ID:	190914   Click image for larger version

Name:	459BC850-8DC2-408F-BC02-4E39B471EDE7.jpg
Views:	205
Size:	233.1 KB
ID:	190915  

Click image for larger version

Name:	5F0E30BF-6CD5-49C6-B90A-FF2DD3BC4BB2.jpeg
Views:	212
Size:	175.5 KB
ID:	190916  
__________________

JimMann is offline   Reply With Quote
Old 28-04-2019, 04:26   #2
Registered User

Join Date: Nov 2007
Location: Probably in an anchorage or a boatyard..
Boat: Ebbtide 33' steel cutter
Posts: 4,524
Re: Repainting my steel boat

Read this from cover to cover

https://www.amazon.com/Metal-boat-ma.../dp/B0070QRME4
__________________

conachair is online now   Reply With Quote
Old 28-04-2019, 04:38   #3
Registered User

Join Date: Apr 2019
Boat: Bruce Roberts Spray 36 pilothouse
Posts: 32
Re: Repainting my steel boat

Quote:
Originally Posted by conachair View Post
Just bought it, much appreciated
JimMann is offline   Reply With Quote
Old 28-04-2019, 05:24   #4
Senior Cruiser
 
hpeer's Avatar

Cruisers Forum Supporter

Join Date: Dec 2008
Location: Philadelphia
Boat: Murray 33-Chouette & Pape Steelmaid-44-Safara-both steel cutters
Posts: 5,255
Re: Repainting my steel boat

Conachair’s recommendation is a good one; he beat me to it.

Your question is not clear as to what you intend. Presumably the bottom has a barrier coat such as coal altar epoxy or a 2 part epoxy. If it does not have one it needs it. The basic idea is that the steel needs to be isolated from the “bottom” paint to prevent an unwanted reaction.

Any bare Steel needs to be protected first.

Above the waterline if you are going to strip (sand blast) to bare steel then I would use a 2 part epoxy like Ameron 235. If you are doing paint repairs the 2 part is a PITA to mix in small batches. We have been using Petit RustLoc for repairs. Clean the area, remove loose rust, treat with acid, 5 to 7 coats of RustLoc following overcoat times. It too is a PITA, just not quite as bad. For truly small spots you can try POR15. They sell it in small quantities in a 6-pack. But that’s just for where you only need a couple of square inches.
hpeer is offline   Reply With Quote
Old 28-04-2019, 05:31   #5
Tim. Keith-Lucas
 
tkeithlu's Avatar

Cruisers Forum Supporter

Join Date: Feb 2012
Location: Carrabelle, Florida
Boat: Fiberglas shattering 44' steel trawler
Posts: 1,077
Re: Repainting my steel boat

Good to meet you, Jim Mann. I have a Bruce Roberts 44 diesel. My experience has been that unless you are absolutely willing to follow the book inch by inch, base paint on steel is a professional's job, with a penalty in the contract for it coming off. I say this having built mine.

On the other hand, with 14 aluminum plates as anodes, maintaining over a volt on the silver test probe, I've had nothing whatever corrode under the water line, after seven years in salt water. Not even bare metal. I chase rust above the water line with a spray primer and epoxy. It's not beautiful, more minature ship than yacht, but damn, is it ever tough. --Tim.
tkeithlu is offline   Reply With Quote
Old 28-04-2019, 05:43   #6
Registered User

Join Date: Apr 2019
Boat: Bruce Roberts Spray 36 pilothouse
Posts: 32
Re: Repainting my steel boat

Thanks Hpeer,

The boat is epoxied inside and out, I thought red lead was applied to bare metal hence my question. I asked the previous owner if it needed sandblasted but he said absolutely not. (Had it confirmed that it doesn’t) he just said he was planning giving it a coat of red lead and antifoul which seemed strange and as I said before, I’m at a loss to find the correct questions at the moment as I’m a bit overwhelmed
JimMann is offline   Reply With Quote
Old 28-04-2019, 06:16   #7
Registered User

Join Date: Apr 2019
Boat: Bruce Roberts Spray 36 pilothouse
Posts: 32
Re: Repainting my steel boat

Hi Tkeithlu,

The only rust on it is from the gunnels, the previous owner drilled holes in the them as they were holding water whilst being stored. I will be grinding them off when I go down next week as they seem pointless without being able to drain.
JimMann is offline   Reply With Quote
Old 28-04-2019, 06:31   #8
Registered User

Join Date: Apr 2019
Boat: Bruce Roberts Spray 36 pilothouse
Posts: 32
Re: Repainting my steel boat

Quote:
Originally Posted by tkeithlu View Post
Good to meet you, Jim Mann. I have a Bruce Roberts 44 diesel. My experience has been that unless you are absolutely willing to follow the book inch by inch, base paint on steel is a professional's job, with a penalty in the contract for it coming off. I say this having built mine.

On the other hand, with 14 aluminum plates as anodes, maintaining over a volt on the silver test probe, I've had nothing whatever corrode under the water line, after seven years in salt water. Not even bare metal. I chase rust above the water line with a spray primer and epoxy. It's not beautiful, more minature ship than yacht, but damn, is it ever tough. --Tim.
If you found a above water rust spot how would you go about sealing it?
Once I grind away the gunnels, I will expose bare metal, how would you take care of that?

Thanks
JimMann is offline   Reply With Quote
Old 28-04-2019, 06:34   #9
Registered User
 
Mr B's Avatar

Join Date: Aug 2011
Location: Melbourne Australia
Boat: Paper Tiger 14 foot, Gemini 105MC 34 foot Catamaran Hull no 825
Posts: 2,069
Re: Repainting my steel boat

If you sand blast it, Paint it immediately as rust will form on the bare steel straight away,
Then it will have a film of rust under the paint you cant see,
Put a steel nail in a glass of water and see how long it takes to rust,
Mr B is offline   Reply With Quote
Old 28-04-2019, 07:20   #10
Registered User

Join Date: Apr 2019
Boat: Bruce Roberts Spray 36 pilothouse
Posts: 32
Re: Repainting my steel boat

Ah just realised my question was already answered.. thanks
JimMann is offline   Reply With Quote
Old 28-04-2019, 09:01   #11
Registered User
 
redhead's Avatar

Join Date: Mar 2011
Location: PNW 48.59'45N 122.45'50W
Boat: Ian Ross design ketch 63'
Posts: 1,048
Images: 9
Re: Repainting my steel boat

Quote:
Originally Posted by JimMann View Post
If you found a above water rust spot how would you go about sealing it?
Once I grind away the gunnels, I will expose bare metal, how would you take care of that?

Thanks
Does anyone use Ospho anymore? I ask because that's what we would have used on exposed metal on our steel boat, but then that was 20 years ago.
__________________
It's what you learn after you know it all that counts...
redhead is offline   Reply With Quote
Old 28-04-2019, 09:01   #12
Registered User
 
mvmojo's Avatar

Join Date: Mar 2018
Location: www.mvmojo.com
Boat: Robt Beebe Passagemaker 49-10 in steel
Posts: 191
Re: Repainting my steel boat

Above the waterline, for bare steel if there's any rust at all, coat with Corroseal (www.corroseal.com - available from Amazon). This will convert any existing rust (even micro rust you can't see) so that the oxidation will stop. Next, a couple coats of DeVoe Bar Rust 235 2-part epoxy (now Amercoat 235). Follow up with a top coat of your choice. For below the waterline, once blasted or sanded to bare steel, coat with inorganic zinc chromate - Ameron Cathacoat 302H. This must be done immediately after exposing bare steel, i.e., don't let it sit overnight or rust will form. The Cathacoat 302H can be overcoated with several coats of Bar Rust 235 - I used 4 coats on MOJO. (You can use Cathacoat for above the waterline repairs as long as you coat any bare steel within a few hours of exposing it, but is not intended for use over existing paint.) Bottom paint comes next. I use PPG ABC 3 bottom paint, usually 2 or 3 coats. I get 4 years out of this paint (in salt water), and at every haul out it looks clear that I could have gotten 5 years (which is how the paint is advertised!).

We just had MOJO painted, roof line to keel, last summer. All suspect areas were sanded down as far as needed to get a stable painting surface, including taking numerous areas down to steel. Cathacoat was applied anywhere we exposed steel. She got at least two coats of Bar Rust 235, up to 4 coats where we took her down to bare steel. The bottom then got two coats of ABC-3 ablative bottom coat (three coats around the waterline and on the rudder) while the topsides got two coats of Amercoat 450 HSG top coat. Came out fantastic! More pics are at www.mvmojo.com

Click image for larger version

Name:	20180806_100150.jpg
Views:	69
Size:	420.0 KB
ID:	190933

Click image for larger version

Name:	Port Side.jpg
Views:	77
Size:	316.4 KB
ID:	190934
mvmojo is offline   Reply With Quote
Old 28-04-2019, 09:24   #13
Registered User

Join Date: Oct 2017
Posts: 4
Re: Repainting my steel boat

Quote:
Originally Posted by tkeithlu View Post
Good to meet you, Jim Mann. I have a Bruce Roberts 44 diesel. My experience has been that unless you are absolutely willing to follow the book inch by inch, base paint on steel is a professional's job, with a penalty in the contract for it coming off. I say this having built mine.

On the other hand, with 14 aluminum plates as anodes, maintaining over a volt on the silver test probe, I've had nothing whatever corrode under the water line, after seven years in salt water. Not even bare metal. I chase rust above the water line with a spray primer and epoxy. It's not beautiful, more minature ship than yacht, but damn, is it ever tough. --Tim.



Hi Tkeithlu,

Staying in South of France, I'm owning a steel Bruce Roberts Spray (53" LOA Gaff rigged ketch) I bought from german people. I am very interested in your aluminium plates as anode, could you please tell me more? Though professionals told me my boat is not actually concerned (other one told me the contrary, proposing to sand blast and repaint the bottom for "only" 12 000 $!) I am very scared of electrolysis, became a lot of different advices, need to know more about how to avoid it. Thank you in advance for your answer, I'm anyway happy to meet some BR owners, I find they are great seaworthy boats, very rare here on the Med!
crisadee is offline   Reply With Quote
Old 28-04-2019, 16:50   #14
Registered User

Join Date: Mar 2018
Location: Dartmouth Devon UK
Boat: Robert Tucker Beagle. LOA:28ft, Beam: 11ft
Posts: 40
Re: Repainting my steel boat

First of all don't panic about a bit of rust. it is a process that happens relatively slowly and steel coats itself with a protective layer...above the waterline.
We have a small steel bilge keeler and have replated sections in the bilge where it had rusted quite thin ... between tides and without lifting out... we have found that you can treat rusty steel effectively with owatrol or penetrol after removing loose rust. sveral coats of that and then oil based paint mixed with a bit of owatrol and you can get a good finish that sticks to to rusty steel.

any epoxy based coating is a waste of time unless you get it back to absolutely shiny metal by grit blasting and paint immediately.

I would stick to traditional oil based paint... we use skip paint(dumpster paint) and owatrol for most of the boat....and its cheap!

If the paint is sound, leave it on!... chip and grind any rusty patches, get oil based paint on, antifoul and GO SAILING!

the world's oceans are full of strong, waterproof rusty ships that will do thousands of miles.... don't let them scare you into thinking the paint has to be fantastic and the boat has to be completely rust free before you can go sailing.

if you are really broke and your bilge is very rusty indeed you can even fill the bilge with concrete and scrap metal and she will float for your grandchildren with no further maintenance. I might be exaggerating a bit but don't listen to the fearmongering about steel boats. Steel will cry its eyes out for years and years before any real structural damage occurs. when it does rust through it is easy to weld new plates in!

your boat looks great, my friend! get a compressed air chisel and get the worst of the rust off the bottom, paint with oil based paints and GO SAILING!

youtube: putyoursailsup for a nice little film of our boat and a journey....
turtleofdart is offline   Reply With Quote
Old 28-04-2019, 23:38   #15
Registered User
 
Fore and Aft's Avatar

Join Date: Jan 2015
Location: Gympie
Boat: Volkscruiser
Posts: 681
Re: Repainting my steel boat

If you are just going to paint over the old antifoul, give it a hard sand then paint it with https://international-yachtpaint.com...imers/primocon
Then antifoul afterwards, this primocon is good to use if you do not know what the antifoul is.
Turtle of dart is right, you can get away with single pack oil based paint. But I only like to apply over a good two pack epoxy paint base.
I painted my non skid areas three years ago with this cheap oil based paint and they still look good. Berger JetDry Concrete Coating Products
Cheers
__________________

Fore and Aft is offline   Reply With Quote
Reply

Tags
boat, paint, steel

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Repainting Over Previous Boat Name tomfl Construction, Maintenance & Refit 11 13-11-2012 16:27
Expected repainting bottom costs on steel hull Freya 39 MarinerFoss Construction, Maintenance & Refit 10 05-11-2012 13:21
Repainting Hull jmanboating Construction, Maintenance & Refit 1 12-04-2011 10:30
Removing LP Paint from Hull and Repainting - Advice ? h2oloca Construction, Maintenance & Refit 6 20-05-2010 19:35
Repainting Avon Wooden Floorboards jemsea Construction, Maintenance & Refit 4 24-09-2009 07:11



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 19:23.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.