Quote Originally Posted by WinterSoldier View Post
Clean your molds with mineral spirits and a small brush, then air dry them. Ballistol will remove minor rust, but I have had to remove major rust by immersion in lemon juice... then Ballistol will neutralize any remnants of acid. Lube the parts that need lubing (e.g. alignment pins) with a tiny touch of beeswax after heating them. Beeswax melts and spreads like crazy though, so you have to do that very lightly and very carefully carefully. Though I have commercial products, I do most fluxing of lead with beeswax, too... and its the main ingredient in black powder bullet lube, along with some amount of some kind of VEGETABLE oil.
The lemon juice thing is a good idea.

I usually keep my steel molds coated liberally in motor oil, since its so humid here and they rust fast.