1) Wipe spoiler off with alcohol or wax remover.
2) Start with a 400, then 600, then 800, and then 1k if you want a nice smooth surface. WET SAND IT!!
3) Wash it real good, then go to step 1 again.
4) Spray with 1 color primer, a few light coats will do.
5) Spray with a contrasting color, mist it on but dont let it cover everything.
6)Go back to the 800 grit, sand. Wherever the contrasting color is left, there is a low spot. Take some Bondo and fill.
7) Go back to step 1, repeat all steps until you get no contrasting color left
8 ) Spray your smooth spoiler with some adhesion promoter, and then do your base/clear.
9) Let paint cure a week, then wetsand w/1500 and 2000 grits...polish out with fine compound, then wax.
Doing these steps will make your rattle-can job NOT look like a rattle-can job, which from what you just said, you are trying to avoid
Welcome, downwardly mobile yuppies, to the dawn of the Age of Nefarious.
1993 SSEi - FrankenJinx - dead and gone.
1994 SSE (136K strong) - 180* t-stat,HD alternator, most unequipped SSE on the club, XM radio, Kenwood CD/MP3.
2006 Chevy Malibu Maxx LTZ - Custom 2.25" manifold-back exhaust w/FM-80. Probably the only Maxx with this system.