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 Catalina/Capri 25/250 Sailor's Forums
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 Fiberglass Prep. (General Question)		  New Topic  Topic Locked
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BCG-Woodbury
Mainsheet Editor

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USA
396 Posts
Initially Posted - 02/17/2016 :  05:06:48  Show Profile
Hey All -

I have a home fiberglass refinishing project (a shower base). My question is, what would be the best solvent to use before I paint (epoxy paint from a refinishing kit)? The kit only suggest multiple scuffing rounds and TSP with water rinses. I've done 4 rounds of scuffing with both Steel Wool and 220 grit sanding cloth.

Thanks,
Brian & JoAnne Gleissner
Knot So Fast
1984 Catalina 25, SR/SK
Traditional Interior
Lake Candlewood, CT

TCurran
Admiral

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USA
588 Posts
Response Posted - 02/17/2016 :  06:14:06  Show Profile
I use acetone
Tom Curran
1981 Capri 25 Hull #101 "Dirty Debbie"
1988 Watkins 30
PAFB, FL
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Voyager
Master Marine Consultant

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USA
5231 Posts
Response Posted - 02/21/2016 :  16:25:34  Show Profile
TSP will leave a gritty residue so it's best to rinse aggressively. Then acetone. What kind of paint are you using, two part epoxy paint or two part polyurethane? Either way it ought to look great.
Bruce Ross
Passage ~ SR-FK ~ C25 #5032

Port Captain — Milford, CT
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islander
Master Marine Consultant

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USA
3992 Posts
Response Posted - 02/22/2016 :  07:41:34  Show Profile
Careful with the Acetone. If its a plastic base the Acetone could eat it and turn it into a sticky mess. Test it on a small area first. If its fiberglass it should be OK.
Scott-"IMPULSE"87'C25/SR/WK/Din.#5688
Sailing out of Glen Cove,L.I Sound


Edited by - islander on 02/22/2016 07:42:48
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Peregrine
Admiral

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830 Posts
Response Posted - 02/22/2016 :  21:21:06  Show Profile  Visit Peregrine's Homepage
So sorry your post came in after I had my tub re-glazed. I would have asked how the surface was prepped.
With a little surfing I am finding TSP, sanding with 220 grit copious rinsing and a final wipe down with muriatic acid.

"Add a few capfuls of muriatic acid – available at home improvement centers and pool supply stores – to a bucket full of warm water. Dip a scrubbing brush into the bucket and scrub the entire surface of the shower pan with the acid solution. Rinse the shower thoroughly and allow it to air-dry completely."

http://homeguides.sfgate.com/repaint-fiberglass-shower-pan-30541.html

I believe the muriatic acid may be less agressive on the fiberglass and they say just a few capfulls to to a bucket of water.

Hope that helps.
Good luck

John Gisondi
Peregrine #4762

*
Edited by - Peregrine on 02/22/2016 21:24:45
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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.