How are Lee bullet moulds made?

[Ranch Dog]

Clean with acetone, a good long soak and brush scrub. Heat the mould , let cool and clean again. The cutting oil seems to be down in the pores, heating it drives some more to the surface, 4 to 8 hour soak in acetone will get the oil out of the pores.
Liquid Wrench Dry Lube, use it in the cavities, top of block and on the top side and under side of the sprue plate. I swear it lubes without causing wrinkled bullets. and they seem to jump out of the mould.
Spray it on or use liquid applied with a Q-Tip. I didn't believe this would work...I tried it and am sold...it works and is now the only stuff I use on mould. Try It !
Gary

Thanks for the tip Gary!