So I have some black powder and not sure if I'm doing it wrong but placed the powder boolits in a tumbler and let it tumble for 20 mins baked and they came out looking okay not totally coated and had blotches on them. Like I said not doing it right or if it's the powder I'm using. The powder is also 5+ years old so not sure that might be a problem.
Anyway I'd like to know what are some good colors to use ? Also I'm I doing it right with the tumbler? Thanks!