6.1 Hemi into 72 Demon March 2018

Sublime one said
Hope my handy dandy powder coater can do aluminum? That technology is ever evolving.

Why would it not? Powder will adhere to any metal -- it's all in the prep and gun settings to get the best results and adhesion. Aluminum can be tricky though (especially old used cast pieces) so those are best left to the pros.