Help Removing 400 grit marks

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AudiA5

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Hello, my brother tried removing a scratch from his car with 400 grit sandpaper. I tried removing the marks by wet sanding with 800 then 1500. I then used my PC with CG V34, 36, then 38. It looks a lot better but it's still clearly there. I used the above primarily because that's what I had available at the time (I'm willing pick whatever I need up). Can anyone suggest a method of removing these marks? I normally would just try a bunch of stuff and see what works but I'm weary of sanding too much off if I don't need too. The car is a 2013 Audi A5 and it's dark blue.

I appreciate any help I can get.
 
I would try going the opposite direction of the scratches. Time and patience are required. Put it this way, if wet-sanding cant take them out, the spot would have to be repainted.
 
AudiA5 said:
I'm weary of sanding too much off if I don't need too.
Click to expand...

Little too late for that I'd guess.

Only hope from here would be to break out a rotary, something like M-105 and a wool pad and cut until the scratches are gone. Then finish with a finer polish to remove any wool pad swirl marks.

Problem is at this point, the UV protecting portion of the clear in those areas have already been sanded off of the car. You could potentially remove the rest of the clear trying to buff out the remaining scratches.

Either way you go, the paint in that area is already ruined. It's anyone's guess how long it will be before it begins to cloud up in that spot.

Sorry for the bad news but those are the facts.

Check out this short article by Mike Phillips on the subject.

http://www.autogeekonline.net/forum...estions/47152-ceramiclear-paints-careful.html
 
I would leave well enough alone. If you already made it look a lot better I would stop there.
 
Welcome to AGO. Sounds like your brother needs to be on here as well. ;)
I wouldn't do anything else that involves removing paint, e.g., sanding, compound or polishing. I would find a professional detailer in your area that is reputable when it comes to correcting paint. Have him evaluate the scratches and take some paint thickness readings to see if it is worth going any further. For now just apply a quality paste wax on the scratches and make you brother live with it until you find a professional.
BTW, pics would be helpful if you can capture the scratches properly.
 
I tell you what would help, buy you a pack of Meg's 2000 & 3000 ungrit sand paper and wet sand the area, just a few passes then inspect.
A rotary with a wool pad and 105 may fix your problem.
Just take it slow and try not to remove more than you have too.
Or as said leave well enough alone if it looks better.
 
Since you already sanded with 1500 just jump to 3000. (Being careful)

Then hit it with the PC.

PC can remove 3000 but I found it difficult. They told me about using a surbuf pad, but I can't comment on what is the best approach on doing that.
 
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