Thanks to everyone for the info. I found everything at a lapidary supply shop in town, just look in the phone book under lapidary, jem stones, rock polishing, you may have a local store.
I just wanted to polish out some cleaning marks from a 100 year old B&L Tessar. I will use a 2 part acrylic/urethane seam sealer instead of pitch and see how that works out. I don't like the idea of cooking up roof tar, it would smell like death.
Have a weekend.