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How To Fix Cracking Paint

Bondo and bad welds sneaking through? Make it right and do it the right way - we show you how.

By Mark Ehlen, Photography by Mark Ehlen

Whoops, there is a big crack in your paint. You didn't see it before, but there it is. Was it the Bondo that cracked or was it the application of the paint? How do you find out? We're going to show you. There are many reasons you might need to spot-repair your otherwise perfect paint job, such as a door ding, a paint bubble, or a large scratch, but we are going to show you a worst-case scenario-ours was a sheetmetal failure under the bodywork.

To get some expert advice on how to deal with this issue, we spent a day at Muscle Car Restorations in Chippewa Falls, Wisconsin. These guys are well known for their world-class full restorations, but they are also glad to take in partial work. This is doable in one day, so you shouldn't have to miss your next event.

PARTS LIST
DESCRIPTION PN PRICE
3M sandpaper, 80-grit 03005 $2.99*
3M 400-grit, wet or dry 03018NA 3.99*
3M 1,500-grit, wet or dry 03002NA 3.79*
3M 3-inch 36-grit Roloc disc 22393 47.00/box 50
3M green bristle disc 07526 104.90/box 10
3M Roloc disc holder 05540 18.17
3M reinforced weld grinding wheel 051131-01991 5/33.65
3M Scotch-Brite pad ultrafine gray 07448 0.25
Evercoat Rage Xtreme 120 40.25/gal
PPG Acryi-clean DX320 231.51/gal
PPG color blender DBC 500 56.49/gal
*Checker/Schuck/Kragen Auto Parts
By Mark Ehlen
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