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Discussion Starter · #1 ·
Getting ready to glass in new casting decks. Do I need to put a finish over the fiberglass on the underside? I plan to use brushable gelcoat for the top sides but didn’t know if I needed to do all under sides also. It is foam core and polyester resin. Could paint if needed for an easier application.
 

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Brandon, FL
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10,938 Posts
To clarify, apply your cloth to the foam core.

Painting or gelcoat is not necessary.

You need to scuff before attaching.
 

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Discussion Starter · #4 · (Edited)
yes I laminated two layers of 1708 top and bottom already on the foam core panels. It would be easier to put a finish on the bottom before I glassed it down to the gunnels.
To clarify, apply your cloth to the foam core.

Painting or gelcoat is not necessary.

You need to scuff before attaching.
nated two
 

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Brandon, FL
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10,938 Posts
yes I laminated two layers of 1708 top and bottom already on the foam core panels. It would be easier to put a finish on the bottom before I glassed it down to the gunnels.

nated two
Yes, indeed, it would be easier. But not needed.
 

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Fine line between recreation and degeneracy.
1978 mako 17
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323 Posts
Yes. If using poly use a gelcoat for it to fully cure it needs zero exposure to oxygen. Or just use a couple coats of PVA which can be washed off at a later time. Water soluble.
 
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