I didn't do a spray can job as such, I just applied enough between layers of TremClad to add the sparkle without adding any color, then applied the next layer over and wetsanded.
Beware of aluminium paint, it's mentioned in earlier posts as being totally different to work with and it doesn't sand or polish like regular TremClad does. IIRC, it's not a good base to paint over, either.

I want to die like my Grampa, peacefully, in his sleep. Not screaming in terror like his passengers.