I did some aluminum alloy wheels last weekend. This is my process...
1 Wire wheeled rim to rough it up a little
2 Blow rim off
3 Warm up Aluminum Chromate and spray it on
4 Let set for about 3 minutes
5 Hit again with Chromate and let sit for another 2-3 minutes.
6 Rinse off with distilled water
7 Put in oven for 20 minutes to outgas and dry
8 Pull out of oven and wait til it cools to about 90* and coat
9 Baked powder at required temp
Heres the rims...I had to strip the insides of the slots and middle too. Satin black.
