Thanks Ed.   Yes, my buddy is really enjoying them.
Ntjetsmoke,  
1)  No, I cheaped out and used the primer and clear I had on hand.   What I used was:
Speedokote SMR-210  Grey 2K Primer   w/ SMR-211 activator
Speedokote SMR-1150  Urethane Clear   w/ SMR-1102-Q Activator Medium.
Fortunately, I had no compatibility issues.
2)  Nope, I sprayed the BIN straight from the (fresh) can.   It doesn't require any thinning when spraying with a 1.4mm tip.   If you have a can that's been open for a while you might want to add a little denatured alcohol.
3)  Unfortunately, no.   Life is getting in the way, and I decided I'm not going to paint my X-MTMs until I finish building the matching center and rear channels, and subwoofers.     Hopefully later this fall.    Still leaning towards metal flake though...
Jeff