Try this link to my post on 24hourcampfire, since several questions were already asked and answered in that thread. If the link doesn't work for you, let me know and I'll copy/paste the post here.
http://www.24hourcampfire.com/ubbthreads/ubbthreads.php/topics/9355027/Re:_Dry_tumble_powder_coating#Post9355027Hope that helps!
BTW, I posted the wrong # for the powder I like earlier in this thread, it's RAL 6018, as you can see in one of the pics in that link above.
One tip, that I think a lot of people miss, is when shaking the bullets in the powder, you really want to shake the living snot out of it. I shake as hard and fast as I can for about 20-30 seconds, in sort of a swirling motion. If you're holding the container in just one hand, or aren't getting good coverage of the powder, you probably aren't shaking hard enough.