I've read threads until my eyes got blurry and unless I missed it, I haven't seen these two (maybe dumb) questions answered.
In powder coating, do the boolits have to be freshly cast or can I PC some that have been setting in a sealed container for a few years? Dull gray instead of bright.
I noticed in a couple of threads folks mentioning sitting them outside in the cold to "cure". Does this just mean cooling off or is there actually a curing time?