650/X-2 Gel-coat or Paint

WFO Speedracer

A lifetime ban is like a lifetime warranty !
Location
Alabama
To you guys saying its gelcoat, first off you have no clue and secondly please explain how you get Gelcoat to stick to SMC, we will be waiting on your answer.
 
Location
dfw
Gel-coat is used in open molds because its cheap. Paint must be used on parts made in pressure molds like SMC. Paint is much more expensive but also more UV resistant than gel-coat. A single stage Imron or equivalent is best overall. Look to industrial, heavy equipment, or aircraft supply for best prices.
 
Gelcoat will never sitck to smc ... unless you use epoxy gelcoat but good luck to have a shiny surface then ...

Polyurethane paint will be faster, cheaper and better look.

by the way gelcoat is stiffer no doubt about that but it took forever to have a good looking surface.
 

WFO Speedracer

A lifetime ban is like a lifetime warranty !
Location
Alabama
t
Gelcoat will never sitck to smc ... unless you use epoxy gelcoat but good luck to have a shiny surface then ...

Polyurethane paint will be faster, cheaper and better look.

by the way gelcoat is stiffer no doubt about that but it took forever to have a good looking surface.


You are 200% correct, gelcoat is used in a mold when a polyester resin is being used on top of it, this creates a chemical bond between the two products, gelcoat can be sprayed externally over polyester, epoxy or vinyl ester resins but the surface must be abraded so the gelcoat has something to stick to, this creates a mechanical bond between the two surfaces.

Now the reason it will not work on SMC is because of the mold release in the SMC material itself, abrading the SMC creates heat which brings the mold release to the surface.It is recommended that when doing a pain repair on SMC that the surface be hand sanded to minimize heat and the release of the mold release compounds. In short paint it and be done.
 
Location
Michigan
Thanks sooo much for all the info. I just want a tough finish on my ski. I have put in a lot of time on the hull and want it to come out looking sweet.Picture 152.jpg
 

WFO Speedracer

A lifetime ban is like a lifetime warranty !
Location
Alabama
MAX GPE
stuff is amazing, they do lots of coatings, so just call and they will take care of you.
you apply with brush/roller/sprayer and it gels out perfect with a great gloss.
I havnt done a hull but used white on upper deck and was simple and easy...
 
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