I was molding a pattern of a 1/72 X-wing concept fighter I made it is made from Pvc pipe and styrene it has a coat of Rustoleum primer on it and I'm am wondering if the primer is causing it not to cure. I'm using Mold Star 15 which I used to mold my 1/20th scale APC but now that I think of it was in a self etching auto primer and not the Rustoleum I used on that pattern. Some input on this would be greatly appreciated this has me perplexed as it never has happened while using Smooth On products.
Ray
Ray