Ordered 18 yards of 1708,4 gallons of polyester resin from a friends uncle in moyock,nc yesterday. just been doing a bunch prep work. Do I need to grind back all the gellcoat were my tie in points are gonna be? Thats alot of grinding and sanding. I guess my question is can you glass over roughed up gel coat? or does all of it have to come off? I read on other forums that glassing over gelcoat will depreciate the strength of the bond to the surface.
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