What sanding grit to use to repaint a bumper cover to different color?

1998 GMC JIMMY
160,000 MILES • 4.3L • V6 • 2WD • AUTOMATIC
Avatar
ROYCAR71
  • MEMBER
  • 359 POSTS
I replaced my bumper cover with a bumper cover from a salvage yard with different color and did body work. Now I want to repaint it to the color of the base color of my car what sanding grit do I use to scuff the whole bumper to prime it and then repaint it?
May 26, 2015 at 1:52 PM
Advertisement
Avatar
HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
you have to use special primer on plastic prior to paint. scuff with either 320 or 400 grit prior to primer then rescuff with 400 after primer
May 26, 2015 at 3:12 PM
Avatar
ROYCAR71
  • MEMBER
  • 359 POSTS
Does this exclude Rustoleum's sandable primer all purpose fast drying primer?
Image (Click to enlarge)
Attached Media
May 26, 2015 at 3:55 PM
Avatar
HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
yes it does rubber bumpers take a special adheshive type primer a lot of major auto parts have it with their duplicolor stuff
May 26, 2015 at 4:04 PM
Avatar
ROYCAR71
  • MEMBER
  • 359 POSTS
Lastly, is it ok to use grease and wax remover over the finish bondo repair?
May 26, 2015 at 4:17 PM
Avatar
HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
bondo shouldn't need that only rest of bumper of course it should have been done prior to starting.
May 27, 2015 at 6:52 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.