Okay, got the wheels painted this past weekend and just used the little bottle with the compressed air attachment from NAPA...it worked great! It did take three of them, however.
The guy who mixed the paint at NAPA said I really didn't need the hardner or the flex additive so I just went with the good old argent silver. I'm still in the process of masking and painting the black on top of that...what a pain, but they look good.
Here's what the finished spare looks like...I'm getting ready to do a couple of more today.