Seasoning lead furnaces???????????

[Quigley 45-120]

I recall reading about ways to season lead pots and furnaces by rubbing a little bees wax around the inside edge of the warm pot after casting but before it cools off too much. Does anyone have any experience with this? Seems like i've also heard about guys boiling oil in the pot from time to time (similar to seasoning a cast iron skillet) to keep the inside from rusting and causing so much crud in your clean lead. Wanting to find a way to try to keep a new pot in the best shape for casting without quite so much rust and crud flaking off into the lead mix. Any help appreciated. Quigley

[oldwoodburner]

Quigley 45-120
     I'll try this again as my dog must have ate my first post.
  Yes I've boiled oil in the pot until the oil caught on fire and flames went two feet high.  Luckily I was able to smother the fire and no harm was done.  
      After abandoning that procedure I used bee wax or candle wax to coat the pot after it cooled some.  Lately I've just been using crisco shortening (as Horselfly suggested)  for a flux and  letting some run down the side of the warm pot to control rust.
      Both the wax and crisco control the rust reasonably well but there is
still a build up of crud or lead oxide or whatever that needs to be wire brushed out from time to time.
       I think this is as good a way as any because I rarely have bullets with pock marks of grit showing and I'm happy with the weight spread of my bullets ,so I don't think I have much problem with internal voids either.
             Oldwoodburner