I waxed the dash really filling any imperfections with wax then gave it a good thick coat of Poly Vinyl Alcohol (pva) let it dry in the sun . soon as it was dry applied gel coat .I've taken two more molds since both came off perfect no problem at all. I used school clue first time I ever did it washable pva which worked but run out so I mixed it with proper pva wood glue now that stuck like a bugger lol
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