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 05-04-2012, 06:18   #16
Registered User
 
Matt sachs's Avatar

Join Date: Jul 2010
Location: East Tennessee
Boat: 1989 50 ft Roberts
Posts: 859
Images: 18
Re: Hull Painting

Thank you. I'm sure to have more questions as I go....thanks again.
Matt sachs is offline   Reply With Quote
Old 17-10-2012, 11:35   #17
Registered User
 
Matt sachs's Avatar

Join Date: Jul 2010
Location: East Tennessee
Boat: 1989 50 ft Roberts
Posts: 859
Images: 18
Re: Hull Painting

Hi Guys. Ive been away for a while, but the progress on the boat is going nicely.
She is now under roof. Its nice to be able to work when its raining and leave the tools out at night. I'm thru with the sand blasting. The hull has three coats of Amercoat 240 inside and out and the exterrior faired. Finish coats will be applied later. It looks good even if I do say so myself. I have fabricated the wheel house windows and the forward hatch. I'll have to wait for warmer weather to glass the deck. I have located a local supplier for the polyIso spray foam. The lumber is at 10% moisture content for the inside work.
Matt sachs is offline   Reply With Quote
Old 17-10-2012, 12:28   #18
Resin Head
 
minaret's Avatar

Cruisers Forum Supporter

Join Date: Aug 2007
Location: Seattle WA
Boat: Nauticat
Posts: 7,205
Images: 52
Re: Hull Painting

What did you end up fairing with?
minaret is offline   Reply With Quote
Old 17-10-2012, 12:34   #19
Registered User
 
Matt sachs's Avatar

Join Date: Jul 2010
Location: East Tennessee
Boat: 1989 50 ft Roberts
Posts: 859
Images: 18
Re: Hull Painting

West thickened with 404.
Matt sachs is offline   Reply With Quote
Old 17-10-2012, 12:57   #20
Registered User
 
lateral's Avatar

Join Date: Apr 2011
Location: NZ
Boat: S34 Bob Stewart - 1959 Patiki class. Re--built by me & good mate.
Posts: 1,109
Re: Hull Painting

Don't you use 407 or 410 with steel? Much easier to sand.
lateral is offline   Reply With Quote
Old 17-10-2012, 13:27   #21
Registered User
 
Matt sachs's Avatar

Join Date: Jul 2010
Location: East Tennessee
Boat: 1989 50 ft Roberts
Posts: 859
Images: 18
Re: Hull Painting

I had very little sanding, but yes its a son of a gun to sand - strongest and almost impossible to knock off.
Matt sachs is offline   Reply With Quote
Old 17-10-2012, 14:17   #22
Resin Head
 
minaret's Avatar

Cruisers Forum Supporter

Join Date: Aug 2007
Location: Seattle WA
Boat: Nauticat
Posts: 7,205
Images: 52
Re: Hull Painting

Quote:
Originally Posted by lateral View Post
Don't you use 407 or 410 with steel? Much easier to sand.



+1. Use 407 for general fairing and 410 for final fairing/pinhole filling only. I can't imagine fairing in 404. Must have been work. Another thing to keep in mind is that 407 is made for fairing and is a little more flexible, which helps it maintain it's bond. You want the fairing to flex at the same rate as the substrate, ideally.
minaret is offline   Reply With Quote
Old 17-10-2012, 15:13   #23
Registered User
 
Matt sachs's Avatar

Join Date: Jul 2010
Location: East Tennessee
Boat: 1989 50 ft Roberts
Posts: 859
Images: 18
Re: Hull Painting

Thanks for the input. Hope I didnt screw it up. I didnt have to do much build up. Mostly I skimmed the surface to get rid of the "old steel" texture and to dress up a few crappy looking welds.
Matt sachs is offline   Reply With Quote
Old 17-10-2012, 16:31   #24
Resin Head
 
minaret's Avatar

Cruisers Forum Supporter

Join Date: Aug 2007
Location: Seattle WA
Boat: Nauticat
Posts: 7,205
Images: 52
Re: Hull Painting

Quote:
Originally Posted by Matt sachs View Post
Thanks for the input. Hope I didnt screw it up. I didnt have to do much build up. Mostly I skimmed the surface to get rid of the "old steel" texture and to dress up a few crappy looking welds.

It'll probably work out fine. Another point is that 407 and especially 410 give you a lot more fairing compound per volume of epoxy, ie a quart of resin thickened with 404 actually gives you less than a quart of filler, but a quart of resin mixed with 407 gives back a good 1 1/2 qt. of filler, 410 2 qt. or more. This makes a huge difference in economy.
minaret is offline   Reply With Quote
Old 07-11-2012, 12:26   #25
Registered User
 
Matt sachs's Avatar

Join Date: Jul 2010
Location: East Tennessee
Boat: 1989 50 ft Roberts
Posts: 859
Images: 18
Re: Hull Painting

Time for another update. Inside the hull, below the waterline, got sandblasted and painted with the same stuff I painted the outside with. (Americoat 240) . Blasting inside the hull makes one hell of a mess - I dont reccomend it. It took all day to clean up and pressure wash the entire inside of the boat to get the grit out. I had to cut a few lubber holes (is that the right word) so all the water drained to the bilge. It looks so nice I dont want to cover it up.
I think if the paint will protect the out side from salt water, it sould work on a little condensation.
Matt sachs is offline   Reply With Quote
Old 18-03-2013, 13:36   #26
Registered User
 
Matt sachs's Avatar

Join Date: Jul 2010
Location: East Tennessee
Boat: 1989 50 ft Roberts
Posts: 859
Images: 18
Re: Hull Painting

I got 2 sample cans of expanding polyiso foam today. Its marketed as a closed cell fire retartant foam. I'll play with it for a few days before I decide if I'm going buy the 2-600 board feet cannisters I'll need to do the boat.
I think most folks use polyurathane foam. Has anyone used expanding polyiso inside the hull on a steel boat down to the water line? How did you like it?

I plan to apply this stuff to some scrap steel and test the "fire retardant" aspect. Should be fun
Matt sachs is offline   Reply With Quote
Old 20-03-2013, 09:57   #27
Registered User
 
Matt sachs's Avatar

Join Date: Jul 2010
Location: East Tennessee
Boat: 1989 50 ft Roberts
Posts: 859
Images: 18
Re: Hull Painting

The fire test went well. I'll post the video later. I put a layer of expanding polyiso on a 3/16 plate, let it cure for 10 minutes then cut the plate in half with an acetylene torch. The flames went out in less than 15 seconds.

I did the same with polyurathane foam, styrofoam and the "great stuff" from lowes - they all burned until the foam was gone.
Matt sachs is offline   Reply With Quote
Reply

Tags
hull, hull 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
Hull Painting Matt sachs Construction, Maintenance & Refit 26 20-03-2013 09:57
Hull Deck Seam Damaged and I Need Help Karmacal Construction, Maintenance & Refit 59 28-02-2012 11:42
Need Help on Hull Construction RaySea Lady Construction, Maintenance & Refit 19 25-02-2012 06:01
Opinions on this Hull ... sharpey Construction, Maintenance & Refit 1 24-02-2012 01:42
Possible Hull Integrity Problems ... What do you think ? (with pics) SeaSloth Construction, Maintenance & Refit 13 23-02-2012 19:20

Advertise Here


All times are GMT -7. The time now is 04:52.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.