I have a project - 5ft dome that is about 5in deep. I will have to glue MDF boards and 3d machine on my CNC router. I've done many molds with seems and used primer however when exposed to long run heat primer failed and small spots would come out.
My question is what would be best solution to hide MDF layer seems ?
Is it the way mold has to be sprayed or baked after words ? I'm pretty sure I wont find material thats 6' x 6' x 5" deep.