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  #1  
Old 04-16-2012
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bottom fairing

I'm looking to fair a spot on my boats bottom that's find of wavy
It;s a fiberglass hull with bottom paint over the gel coat
If I want to use a fiberglass filler compound (I know of a few, one that is supposed to be 'waterproof' ) Do I need to remove the gelcoat and get right down to the fiberglass or can I just sand the hard bottom paint off and fair over the gelcoat and then repaint?

I've tapped the hull in the problem area and it sounds like the glass is good.
I've also had a pro fiberglass person check it out and talked to the boat builder about it and they said it wasn't a structural worry
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Old 04-16-2012
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Re: bottom fairing

I would remove all paint down to gelcoat and fair with thickened epoxy.
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Old 04-18-2012
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Re: bottom fairing

THanks
I should've bought some epoxy
i picked up some duraglass instead (it's a fiberglass short strand filler)
However I could likely take it back as it's unopened

Out of curiousity what would you reccomend for a bottom coat
I don't know the paint that's on there
It's red and has a dull sheen, It doesn't seem to be in anyway flaking off
I was going to try and contact the previous owner but I'm not sure if it'll work

my boat spends most of it's time on a trailer but I will be putting it in for a month, thus the desire to paint
I've heard that the rustoleum bottom paint will paint over most paints and can be taken out for long periods

Any suggestions
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Old 04-18-2012
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Re: bottom fairing

It is unlikely that the duraglass will stay there long term - epoxy will.

If the paint is in good condition sand it with 80 grit and solvent wash before painting.
From the Rustoleum label:
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Old 04-18-2012
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Re: bottom fairing

Do you know where I can find Rustoleum bottom paint up here
The local $@#$@$ home repo doesn't have it. I have yet to check crappy tire but Martin Marine (north van)doesn't carry it either
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Re: bottom fairing

If I didn't know what the current paint was, I would bite the bullet and remove it. Shortcuts always cost me.
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Re: bottom fairing

Rustoleum should have a dealer list on their site or you can email or call them.
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Old 04-18-2012
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Re: bottom fairing

I got my Rustomeum from a Paint Dealer/paint shop (that services home painters and wall paper hangers etc..) They were able to order thru their dealer network...

Sounds like you have the same red, ruddy, lumpy, soft ablative I had on my boat (See "Sanding my Bottom")...

My understanding is the Rustoleum will NOT hold up over the soft ablative...which is what got me into sanding mine...

I would be OK over barrier coat, bare (primed) glass or another "hard" ablative ...but if you can scratch it with your fingernail...it's too soft...

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Re: bottom fairing

If the boat is normally dry sailed and you are just putting her in for 4 weeks, I wouldn't add any more paint. Rather I'd scrub her myself a bit each week.
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Old 04-18-2012
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Re: bottom fairing

In essence I agree with WDS for short term immersion.. just keep it scrubbed and avoid paint if possible.

But if you really want to paint WM locally has a pretty good deal on an ablative in-house antifouling at $100 for a gal.. pretty much half price - though I'm not sure how it would compare to Micron CSC performance-wise, for instance.... You could probably do your whole boat with a quart or litre.
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