Getting a smooth finish after the Fibreglass

Fiberglassing over plywood and one-off fiberglass methods. See: "Boatbuilding Methods", in the left-hand column of the Home page.

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stephenburnett
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Joined: Thu Nov 05, 2020 5:43 pm

Getting a smooth finish after the Fibreglass

Post by stephenburnett »

I am wondering if anyone has used a product called "Slicksand" after the fibreglass cloth has been applied?
The finish after two coats of FG and paint is unsatisfactory and Slicksand was recommended by a Fibreglass specialist - because I had already painted the FG and Gelcoat would not take. Any experience using Slick's sand out there?

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Roberta
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Re: Getting a smooth finish after the Fibreglass

Post by Roberta »

I would sand back to the FG resin, recoat with at least one more coat of resin, then use a high build primer prior to top coating. Sanding and prep is key to that high gloss finish. Don't expect gobs of paint and primer to cover up a poorly prepared surface.

Roberta
Roberta "Queen of the Boat Builders"
Built Zip "Oliver IV", Super Spartan "Jimmy 70", and Torpedo "The Glen L".

stephenburnett
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Joined: Thu Nov 05, 2020 5:43 pm

Re: Getting a smooth finish after the Fibreglass

Post by stephenburnett »

Thanks Roberta - are you suggesting that I sand completely through two layers of fibre glass cloth to the plywood?

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Bill Edmundson
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Re: Getting a smooth finish after the Fibreglass

Post by Bill Edmundson »

Put 2 or 3 three coats of epoxy resin on top of the fiberglass. Not more cloth. Then you can sand it smooth without removing the cloth. If you get into the cloth you will see it. Just add a layer of resin and finish smooth. You will still need to coat with paint or clearcoat for UV protection.

Bill
Mini -Tug, KH Tahoe 19 & Bartender 24 - There can be no miracle recoveries without first screwing up.
Tahoe 19 Build

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Roberta
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Re: Getting a smooth finish after the Fibreglass

Post by Roberta »

Like Bill suggests, just sand down to the cloth, but not to the wood. Add resin to keep the cloth covered. Once you have it all smooth and coated with resin, start your primer and top coats.

Roberta
Roberta "Queen of the Boat Builders"
Built Zip "Oliver IV", Super Spartan "Jimmy 70", and Torpedo "The Glen L".

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Mr Hot Rod
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Re: Getting a smooth finish after the Fibreglass

Post by Mr Hot Rod »

The West System manuals manuals are a must-read if you are doing anything in fiberglass. Pay attention to the number of barrier coats to guarantee a pro outcome. If you are restoring a fiberglass boat, this is a good place to start (or impress your friends with your glass knowledge !) ____________________

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Paul Kane
Kane Custom Boats Ltd.
Chelsea, Quebec

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