What is the best way to spray paint over an already existing powder coat. For instance: My CAI is powdercoated red, and now i want it black. I want to use spray paint to do this. Should i sand first, or just spray it on? Are there any other techniques to make it turn out better.
Prep it as you would any other thing you have spray painted. Sand it with a red Scotchbrite pad or 400 grit sandpaper.Then take some lacquer thinner and clean it thouroughly with a paper towel.Now take a tack rag and remove any lint or dirt you have left. Now you are ready to paint it.Do not touch it with a paper towel , a rag, or your bare fingers until after the paint is dry. It should be hung up in such a way that you can get to all areas without moving the piece. Allow it to air dry for an hour before you touch it, then bake it at 200 degrees for 10 minutes, or leave it to dry for a day. I do not think that 200 degrees will remelt the powder coat, and it will somewhat harden the paint. Just don't use your house oven as the smell is overwhelming and you will not be able to cook in your oven for some time(Don't ask me how I know!). Get a junk oven that works and use that. I oven baked Dupli Color engine enamel over Scotch brited chrome engine pieces 2 years ago and the paint hasn't flaked or peeled!
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1998 Nissan Frontier XE/2wd/5spd 1 owner, 264k miles
1985 Olds Cutlass, 350 Chevy, owned for 14 years
WANTED: 1968-1973 Datsun 510 or 1991-1994 Sentra SE-R http://www.myspace.com/junkyardengineer
As long as the surface is scuffed, paint will stickk juuuuuuuuuust fine
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Since March 2003 --- 8 Years of DNEness
2005 Nissan Maxima SL with TCS, VDC, Power Sunroof, and Driver Preferred Package
Mods: Custom E&G Grille with center brace and emblem removed then powdercoated black, 5000K HID Fogs, Switchback LED Turn Signals, Nismo CAI, Tein S-Tech Drop Springs, KYB Struts/Shocks, LED Interior Lights, Debadged Trunk, Magnaflow Mufflers, EZ Koncepts Ruby Red LED Tails, ASA 18"X8" Rims (Black with Polished Lip), and much more to come
^you should get a job at maaco. that sounds like the concept they use.
No, theres is, As long as the car was washed within the last 90 days ....... paint will stick juuuuuuuuuuuust fine
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Since March 2003 --- 8 Years of DNEness
2005 Nissan Maxima SL with TCS, VDC, Power Sunroof, and Driver Preferred Package
Mods: Custom E&G Grille with center brace and emblem removed then powdercoated black, 5000K HID Fogs, Switchback LED Turn Signals, Nismo CAI, Tein S-Tech Drop Springs, KYB Struts/Shocks, LED Interior Lights, Debadged Trunk, Magnaflow Mufflers, EZ Koncepts Ruby Red LED Tails, ASA 18"X8" Rims (Black with Polished Lip), and much more to come
What is the best way to spray paint over an already existing powder coat. For instance: My CAI is powdercoated red, and now i want it black. I want to use spray paint to do this. Should i sand first, or just spray it on? Are there any other techniques to make it turn out better.
I've painted my CAI red again because it looked like it needed some newness to it and it came out fine. I'd definitely light sand it a bit before applying new paint.
What is the best way to spray paint over an already existing powder coat. For instance: My CAI is powdercoated red, and now i want it black. I want to use spray paint to do this. Should i sand first, or just spray it on? Are there any other techniques to make it turn out better.
Have you thought about having it powder coated again?
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I'd definitely light sand it a bit before applying new paint. 
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