900SAAB.com:  Repairing Deep Body Scratches Main PageRepairs

On a drive home, in mid July of 2007, my SAAB was egged; four teenage boys were driving around the streets of highlands, Denver, egging cars from the back seat of a fourth generation Jetta. I was driving toward them and didn't even see them throw the egg; I only knew what happened when I heard it hit the back door. I followed them, took down their license plate number and gave it to Denver City Police. 

Two cars passing each other at 35 is like having an egg hit your car at 70 mph; with this force, its shell takes the paint all the way to the base metal.

As much as something like this annoys me, there's nothing that can be done about it other than repair it. This is how to fix such a thing (this also applies to any sort of scratch or chip in your paint).

Here is the damage (the grey is actually where the paint was completely removed):


Begin by thoroughly washing the door to remove all egg, dirt, wax, etc. I cleaned out the damage with a toothpick to ensure it was clean and dried the area with a microfibre. Once the area is clean, fill the scratches with SAAB supplied touch-up paint. I use thin coats and build up the area until the damage is completely filled in and just slightly higher than the surface.  The first few coats I apply are color.  I finish the fill with successive layers of clear. 


Let the touch up paint cure for more than an hour and then sand the area with 2000 grit wet-or-dry sandpaper. This smoothes out the finish and highlights any low spots.  Proceed by applying more touch-up paint until the damaged area is completely filled.  Here is the door, sanded, with the last coat of touch-up applied (the scratches are not nearly as deep as they look; this is an artifact of the flash):


When the scratches were filled and adequately sanded, polished the entire panel using 3M's Fine Cut rubbing compound. This removes the scratches and blends the touch-up into the surrounding paint.  Pictures of the compound and my buffer are shown below.  Nothing fancy. 

 

The results look much better than the original scratched area; the color match isn't perfect, but it works!


And the same results, in the daylight, without the highlighting flash (and a glimpse of my reflection):


Notes: 

The sanding and buffing should be done by hand. The lowest grit sandpaper you want to use is 1500 grit wet or dry and you'll want to finish with 2000 grit wet-or-dry with the reasoning that you want to be especially careful not to sand through the clearcoat or colorcoat. If you sand through the clearcoat or paint coat (for non metallic colors), you'll have to repaint the entire panel, which adds a lot of grief to the job!


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