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Old 12-18-2005, 04:28 PM
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Sanding paint off with 80 grit and noticed...

I finally started sanding paint off today and noticed that on my sharp edges I could feel some irregularites in the metal. Even with a softer touch on the orbital sander I could not seem to get some waves on the sharp edges. Will these be covered up with a high build primer or did I totally screw my car up?
Thanks, Walt

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Old 12-18-2005, 04:34 PM
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what happens if you sand it with some 180 or 320 after ??


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Old 12-18-2005, 05:36 PM
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OK... Trying to understand the question, I will give it a shot. You are working on an older Mustang, and have removed the paint to the metal, using 80 grit paper on an orbital sander. You now feel that the panels are not perfect in the areas of the sharp body lines. I hope this is right.

First of all, contrary to popular belief, the body parts on the older cars (or new cars for that matter) were not perfect from the factory. Most of them actually had very poor "fit and finish". Add to that a vehicle that is 30 or 40 years old, and you have even better chance of them not being perfectly straight.

Now, if the areas in question are supposed to be straight, you can check them with a straight edge to see how "not straight" they actually are. What I usually do, when redoing a complete vehicle is, take a long board to it before completely sanding off the original finish. That will show high and low spots in the metal. It will also give you an idea if the primer will fill the low spots when you start that process, or if there is more work needed. If you are not sure if the primer will fill it when blocked down, then try it. If it is just too low, you can go back and use a 2K glaze filler in the spots where needed.


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