So I’ve got all the grease, gunk, dirt, etc removed from my WD-9. I’ve treated most of the fabricated parts with rust inhibitor, but not the cast parts as the consensus here seems to be that it will eventually cause paint lifting. Now I am putting pieces back together in preparation for primer. Being I have never painted cast surfaces before, I am wondering what the best way to clean the surface prior to spraying. Normally, I would just wipe everything clean with a wax & grease remover and spray. Can I use a spray bottle of wax and greaser remover to reach those hard to reach places? It seems like with the cast surface, the rag never comes back completely clean. Should I tack cloth it also?