I took advantage of Smoke's Christmas sale and ordered the 4-color pack to try my hand at powdercoating. For this first small test I used Smoke's Flame Red powder, Airsoft black .25g BBs, and a small round Rubbermaid bowl with #5 on the bottom of it and a snap-on cover.
Covered the bottom of the bowl with a single layer of BBs, added 26 .357 bullets (Lee TL SWC and WCs), a couple of teaspoons of powder and snapped on the lid. Swirled everything around for about 30 seconds, then shook up and down for a few seconds. I popped the cover to look at them and saw a few bare spots so I swirled and shook again. Everything looked well covered.
While my thrift store convection oven preheated, I picked the bullets out of the bowl with a pair of angled tweezers, tapped the tweezers against the rim of the bowl to shake off any excess powder, and stood them up in a shallow pan covered with non-stick foil. When the oven got to 400* (per a thermometer in the oven, not the oven display) I put them in and set the timer for 15 minutes. I noticed that I lost a lot of heat when I opened the door, down to about 375*, so I added 5 minutes to the bake time for a total of 20 minutes.
20 minutes later I took them out and let them cool on the pan.
There's some slight mottling in the color, I'm not sure why, but they look good enough to shoot. Took one SWC and pounded it flat with a hammer on top of my vise. Didn't see any peeling, flaking or chipping of the PC.
I'm happy with the results.
Obligatory pictures: