Base coat / clear urethane automotive paint. They don't come premixed in a spray can, you gotta mix and spray. Use 3 good wet coats of clear, and when it's dry sand it flat with 1200 grit. Then buff to a high gloss with a power polisher and compound. It's just like painting a car...
1999 Buick Park Ave Ultra
Head Unit: JVC KWHDR720
EQ: Audiocontrol EQL
Front Stage: Hybrid Audio Technologies Imagine 5.25 mids, Morel Maximo tweets
Sub Stage: Boston G3 10", 0.5 cu ft sealed
Amp: PPI Phantom 900.4
Rear Fill: Boston SE953 6X9's