I have an ancient cast-iron pot that I believe is a plumber's pot for melting pipe sealing lead. It's about 5" round and 4" deep with a round bottom and no "feet" or pour lip. Not the handiest of designs but it works. I use this on the trusty Coleman for the first melt to clean up nasty lead and pour ingots. Then, I have an electric Lee bottom-pour pot for casting balls. Using only "pre-refined" lead in the electric pot keeps it relatively clean and flowing smooth.
Stumpkiller...as far as "keeping it clean and flowing smooth", I could use some of that.
I have a couple of Lee Pots, both bottom pours, and both a pain for keeping clean and flowing smoothly. Due to this, I have gone to the stove, iron pot, and dipping. I'm not telling you this method is better, just less frustrating.
Also, for years I was using Marvelux flux from Brownells when I discovered this was "most likely" the cause of my problems as it creates "Cling-ons"...Sounds like Star Wars :crackup:
Anyway, "cling-ons" can best be described as dross / impurities that sticks to the pot and is not dipped off or mixed when fluxing and stiring.
I was told to use, of all things...kitty litter...for fluxing, which I tried, I was very pleased with the results in the electric pots. I don't have any of these problems when using my "pot on the stove" method...go figure!
I'm going to try to show you two pots here, the one on the left is a small 10# pot that kitty litter was never used in, only Marvelux.
The other, on the right, is a 20# pot and "kitty litter" is all that I've used for fluxing.
BTW, The pot on the left cleans up real nice, it's just a pain to go through every time you use it.