trawlers@lists.trawlering.com

TRAWLERS & TRAWLERING LIST

View all threads

TWL: Re: Hatteras blister and other things

JK
J Kaster
Fri, Jan 16, 2004 6:47 PM

What is the downside of bottom paint build up as you described above? I have a
similar paint build up and considering the same strategy by just sanding it a
small amount and repainting. A few areas have flaked off which I didn't see as
a problem if 'bevel' sanded. Is there a downside to this strategy? Your
comment was the second I've heard that build up may protect the hull.
(Pleeease let there not be a downside!) Jerry

The newer 1980 42 LRC Skooch has about 50 mils of Trinidad epoxy built upon

her bottom and no blisters of any kind. Try to get me to remove thebuild up of
epoxy paint as so many have recommended including Pettit, no way. Couple spots
chiped off so  . . . MarineTex and yet more Trinidad.<

Jerry Kaster
jlk@uwm.edu (university)
kaster@tds.net (home)
www.anilith.com

What is the downside of bottom paint build up as you described above? I have a similar paint build up and considering the same strategy by just sanding it a small amount and repainting. A few areas have flaked off which I didn't see as a problem if 'bevel' sanded. Is there a downside to this strategy? Your comment was the second I've heard that build up may protect the hull. (Pleeease let there not be a downside!) Jerry >The newer 1980 42 LRC Skooch has about 50 mils of Trinidad epoxy built upon her bottom and no blisters of any kind. Try to get me to remove thebuild up of epoxy paint as so many have recommended including Pettit, no way. Couple spots chiped off so . . . MarineTex and yet more Trinidad.< Jerry Kaster jlk@uwm.edu (university) kaster@tds.net (home) www.anilith.com
D
David
Fri, Jan 16, 2004 8:59 PM

Jerry,
Sorry, I should clearify my previous post. I would not let the bottom coats
build up on purpose. Getting a thick layer off and starting over is a big
job and thats the downside. But if, like on Skooch, you already have a
build up of bottom paint and it is epoxy and it is in good condition, I see
no reason to fix it.

It is likely that if you let it get too thick the coating will begin to
crack and loose adhesion to the boat or older layers of coating. If this
gets too bad and affects many places on the bottom then you will need to
remove it and start over. Failure will be aggravated by several factors not
always in your control. First epoxy coatings are brittle and may crack on
impacts, hull flex, and even temperature changes. Also, If you have a layer
of paint that was not prepared properly (clean surface prep) or someone
used ablative paint, or if a layer of epoxy cooked outside in Fla for a few
months it can fail. All these things can ruin your thick layer of bottom
paint and require serious man hours to fix.

Skooch Hatteras 42 LRC
Worton Creek MD

David Stahl


           Beacon Technologies Inc.
          Serving The Delaware Valley
   Business and Residential Internet Services
Jerry, Sorry, I should clearify my previous post. I would not let the bottom coats build up on purpose. Getting a thick layer off and starting over is a big job and thats the downside. But if, like on Skooch, you already have a build up of bottom paint and it is epoxy and it is in good condition, I see no reason to fix it. It is likely that if you let it get too thick the coating will begin to crack and loose adhesion to the boat or older layers of coating. If this gets too bad and affects many places on the bottom then you will need to remove it and start over. Failure will be aggravated by several factors not always in your control. First epoxy coatings are brittle and may crack on impacts, hull flex, and even temperature changes. Also, If you have a layer of paint that was not prepared properly (clean surface prep) or someone used ablative paint, or if a layer of epoxy cooked outside in Fla for a few months it can fail. All these things can ruin your thick layer of bottom paint and require serious man hours to fix. Skooch Hatteras 42 LRC Worton Creek MD David Stahl ************************************************************** Beacon Technologies Inc. Serving The Delaware Valley Business and Residential Internet Services