Cruisers Forum
 


Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 20-11-2021, 04:19   #1
Registered User

Join Date: Jan 2018
Boat: 50ft Custom Fast Catamaran
Posts: 5,800
Painting over paint

My mast is painted white and the paint is in decent shape.

Can I just scuff the paint and paint a black coat of paint over it so it goes with the rest of the boatís color scheme?

Trying to maximize the number of things I can get done this winter so the boat can be sailed.
__________________
Epoxy can kill me like a kid smelling peanuts across the lunch room. Even the freshly machined dust from cured epoxy. Please donít suggest using it.
Chotu is offline   Reply With Quote
Old 20-11-2021, 05:16   #2
Moderator
 
tkeithlu's Avatar

Join Date: Feb 2012
Location: Carrabelle, Florida
Boat: Fiberglas shattering 44' steel trawler
Posts: 4,135
Re: Painting over paint

"Results may differ." There is the chance that the new paint will not adhere well or react with the old, but I think that the odds are in your favor. Sand it, and if the adhesion still seems good, I would proceed. It will help if you use the same type paint, even by label, if you know what was used originally.
__________________
Never let anything mechanical know that you are in a hurry.
tkeithlu is offline   Reply With Quote
Old 20-11-2021, 05:36   #3
Registered User

Join Date: Sep 2014
Location: Fiji Airways/ Lake Ontario
Boat: Legend 37.5, 1968 Alcort Sunfish, Avon 310
Posts: 2,046
Images: 11
Re: Painting over paint

Good call on same type of paint.

Wash the whole mast before you scuff it up. Try doing a small section first, it would be a bear to strip a whole mast.
Tetepare is offline   Reply With Quote
Old 20-11-2021, 07:07   #4
Registered User

Join Date: Jun 2019
Location: Rochester, NY
Boat: Chris Craft Catalina 381
Posts: 2,793
Re: Painting over paint

If you know what the old paint is and it's well adhered, you can likely find a paint that will go over it just fine. Even if you don't know what it is, avoid 2 part paints and you'll likely get away with it.
rslifkin is offline   Reply With Quote
Old 20-11-2021, 07:24   #5
running down a dream
 
gonesail's Avatar

Join Date: Mar 2006
Location: somewhere in the deep south
Boat: cape dory 30 MKII
Posts: 2,566
Images: 6
Send a message via Yahoo to gonesail
Re: Painting over paint

definitely wash and scuff all surfaces. test small area before proceeding. if painting in winter watch the temperatures.
__________________
some of the best times of my life were spent on a boat. it just took a long time to realize it

gonesail is offline   Reply With Quote
Old 20-11-2021, 07:24   #6
Registered User

Join Date: Jan 2018
Boat: 50ft Custom Fast Catamaran
Posts: 5,800
Re: Painting over paint

There is no way for me to know what kind of paint is on the mast. It’s a used mast. It’s from Europe originally I think. Seems like two-part polyurethane paint. It’s a very tough, industrial type of finish. Over aluminum. So, I think I can just scuffed it up a little bit with a fine grit sandpaper, and put something else over it. I’m glad the consensus is that might be OK.

Any tips as to what might be a good paint to use? One part? But something that is tough and similar to the paint that is on it? I know it will never be the same as two part, but kind of tough would be good. You know how Masts can be nicked.
__________________
Epoxy can kill me like a kid smelling peanuts across the lunch room. Even the freshly machined dust from cured epoxy. Please donít suggest using it.
Chotu is offline   Reply With Quote
Old 20-11-2021, 08:35   #7
Registered User

Join Date: Nov 2019
Location: Gold Coast, Australia
Boat: Farr 43`
Posts: 364
Re: Painting over paint

Chotu

There are single pack poly-urethanes on the market that are brushable and self priming over Alloy.

I used the marine product from Crystal Paints on a mast three years ago and it's holding up well. https://www.crystalpaints.com.au

Boatcraft has a water based 2 pack poly that goes on over cured single pack products without blistering.
Any bare alloy may need priming.
https://boatcraft.com.au.

Maybe you can find something similar locally.
Rucksta is online now   Reply With Quote
Old 20-11-2021, 08:45   #8
Registered User

Join Date: May 2014
Location: USA
Boat: 41' yawl
Posts: 1,100
Re: Painting over paint

Quote:
Originally Posted by Chotu View Post
You know how Masts can be nicked.


On that note I think I'd be inclined to try a 2part poly on a small section. In my experience (interlux perfection vs brightsides) the two part was significantly more durable.
chris95040 is offline   Reply With Quote
Old 20-11-2021, 08:53   #9
Registered User

Join Date: Jan 2018
Boat: 50ft Custom Fast Catamaran
Posts: 5,800
Re: Painting over paint

Quote:
Originally Posted by Rucksta View Post
Chotu

There are single pack poly-urethanes on the market that are brushable and self priming over Alloy.

I used the marine product from Crystal Paints on a mast three years ago and it's holding up well. https://www.crystalpaints.com.au

Boatcraft has a water based 2 pack poly that goes on over cured single pack products without blistering.
Any bare alloy may need priming.
https://boatcraft.com.au.

Maybe you can find something similar locally.
An important detail. I’m not painting over aluminum. I’m painting over paint. Like the thread title says. So essentially, I’m painting over polyurethane plastic.
__________________
Epoxy can kill me like a kid smelling peanuts across the lunch room. Even the freshly machined dust from cured epoxy. Please donít suggest using it.
Chotu is offline   Reply With Quote
Old 20-11-2021, 09:19   #10
Registered User

Join Date: Nov 2019
Location: Gold Coast, Australia
Boat: Farr 43`
Posts: 364
Re: Painting over paint

Quote:
Originally Posted by Chotu View Post
An important detail. I’m not painting over aluminum. I’m painting over paint. Like the thread title says. So essentially, I’m painting over polyurethane plastic.
Is this the mast to which you will be adding a six foot extension?

How will you achieve that without localised disturbance of the existing paint?
Rucksta is online now   Reply With Quote
Old 20-11-2021, 09:32   #11
Registered User

Join Date: Jan 2018
Boat: 50ft Custom Fast Catamaran
Posts: 5,800
Re: Painting over paint

Quote:
Originally Posted by Rucksta View Post
Is this the mast to which you will be adding a six foot extension?

How will you achieve that without localised disturbance of the existing paint?
Thatís not what the thread is about. Thatís a different thread. This is about painting the entire mast. It is currently white. It needs to be black.
__________________
Epoxy can kill me like a kid smelling peanuts across the lunch room. Even the freshly machined dust from cured epoxy. Please donít suggest using it.
Chotu is offline   Reply With Quote
Old 20-11-2021, 20:43   #12
Registered User
 
fourlyons's Avatar

Join Date: Mar 2012
Location: Baltimore, MD
Boat: 39' Custom built junk rigged cat ketch
Posts: 242
Re: Painting over paint

One of the standard ways to test for good paint adhesion is to paint a test area, let it cure. Score it with a razor blade in a grid pattern with 1/8" squares. Press a piece of tape on to the grid and rip it off. If the adhesion is good none of the squares will come off.
You can use this test to check your preparation of the surface and for paint to paint compatibility.
fourlyons is offline   Reply With Quote
Old 20-11-2021, 21:16   #13
Registered User
 
wingssail's Avatar

Join Date: Jan 2010
Location: On Vessel WINGS, wherever there's an ocean, currently in Mexico
Boat: Serendipity 43
Posts: 4,170
Send a message via AIM to wingssail Send a message via Skype™ to wingssail
Re: Painting over paint

Quote:
Originally Posted by Chotu View Post
My mast is painted white and the paint is in decent shape.

Can I just scuff the paint and paint a black coat of paint over it so it goes with the rest of the boatís color scheme?

Trying to maximize the number of things I can get done this winter so the boat can be sailed.
Scuff yes, sand? Be careful. If you break through to the aluminium then you'll need acid etch, primer, and top coat. Aluminum starts to oxidize instantly once it is exposed to the air.

i've had success where we wet sanded with running water then applied a water based sub-primer while still wet.
__________________
Sailing is a sport, an athletic activity, not a sedentary one.
Fred Roswold-Fred & Judy, SV Wings, Mexico
https://wingssail.blogspot.com/
wingssail is offline   Reply With Quote
Old 20-11-2021, 21:21   #14
Registered User
 
Uncle Bob's Avatar

Join Date: May 2010
Location: Sydney Australia
Boat: Fisher pilothouse sloop 32'
Posts: 2,656
Re: Painting over paint

Some paint pro's will scuff a sound undamaged surface with coarse synthetic pad similar to a scouring pad, don't know the manufacturer but is available in various forms with different densities.
Also be aware that black will get hotter than white, so if the underlying white has any even slightly dubious patches with reduced adhesion there may be problems with keeping the black on.
__________________
Rob aka Uncle Bob Sydney Australia.

Life is 10% the cards you are dealt, 90% how you play em
Uncle Bob is online now   Reply With Quote
Old 20-11-2021, 21:41   #15
Registered User
 
Fore and Aft's Avatar

Join Date: Jan 2015
Location: Gympie
Boat: Volkscruiser
Posts: 1,772
Re: Painting over paint

Chotu a client of main got over 10 years out of there mast paint with this product. We are coming up 5 years on our mast and are happy. The gloss has gone but the paint is holding up well.
Cheers
https://www.dulux.com.au/products/details/31a
Fore and Aft is offline   Reply With Quote
Reply

Tags
paint

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
Foam paint chipping - paint over? svsara Construction, Maintenance & Refit 2 18-11-2021 08:36
Painting Over Teak defever Construction, Maintenance & Refit 36 21-01-2017 03:43
Bottom Paint over Bottom Paint Adrenaline Construction, Maintenance & Refit 3 13-02-2016 14:05
Painting over Gelcoat. James Dieterich Construction, Maintenance & Refit 5 22-06-2011 02:27
Painting over tin-based bottom paint tilmonday Construction, Maintenance & Refit 1 23-03-2006 12:34

Advertise Here


All times are GMT -7. The time now is 21:37.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.