So today I realized that my casting table is about a foot too small and have decided one of my spring projects will be to build a new one. I have always used polyurethane in the past but have absolutely zero knowledge about its ability to withstand heat from sprues and hot molds. Or if there is even a finish that can withstand the heat or if it will even protect the wood underneath. Does anyone have experience on this matter?
Tldr; I want a clear coat to protect wood from hot molds.