After successfully laminating my blank with epoxy, I have had a major set-back with the hot coat.
I used a polyester sanding resin to hot coat the board. But now that it has cured it does'nt seem to have really stuck to the board. It can be lifted up/scraped away leaving the board as if it had never been hot coated.
I have used this exact process before and not had any problem. Just wondering if any one had any ideas what went wrong and how I could fix it?
Thanks.
"After successfully laminating my blank with epoxy, I have had a major set-back with the hot coat.
I used a polyester sanding resin to hot coat the board. "
Rules? we don't need no stinking rules..............
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Without wax solution polyester resin does not harden at the surface. Epoxy on a poly laminate won't stick because that laminate surface will never harden at the poly/epoxy interface. But to a cured sanded surface it will. Interestingly epoxy sticks to a surface that contains wax solution while polyester won't. Polyester will bond to a polyester surface that doesn't contain wax solution but epoxy won't.
Polyester hot coats on epoxy are just a bad idea. They eventually peel off. We did this in FL 20 years ago and after about 3 years stopped. California followed and now most there have stopped for the same reason. Australia got hot on the idea and now people there are stopping as well. It sorta works but in the end it's just a cheap, low quality short cut. Can create yellowing as well.
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