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This is my first time painting my car's plastic bumper and of course I made a mistake. I forgot to put on a layer of primer before the base coat. Now the base coat is already on, should I sand it off and start over or bite the bullet and continue with mid coat and clear coat?

Before applying the base coat, I sanded the entire bumper with 400 grit wet sandpaper. 60% of the area are down to bare plastic.

If I continue without the primer, how long will it last before peeling again?

  • When you sanded the bumper, was there evidence of a primer? If so you should prime it. – Solar Mike Apr 22 at 5:33
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    Did you use or add plastic additive to the paint? Without the additive the paint will crack when the bumper flexes. – mikes Apr 22 at 19:51
  • The base coat is dry, I'll try to flex it tomorrow see if it cracks. – Ray Cheng Apr 23 at 4:56

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