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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Wash, Wax, Detailing and Cosmetic protection/repairs > scratch remover lost shine



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      07-20-2010, 02:22 PM   #1
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scratch remover lost shine

Used 3m scratch remover to take out a scratch and I used too much pressure and now there is a an area of 1 inch by 3 inches that has lost the shine basically it looks like flat white paint now and has minute scratches.

Is there a product or way to make it match the rest of the car. Car is Alpine White 08 335
thanks for checking.
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      07-20-2010, 02:25 PM   #2
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First clean the area with a 50/50 of alcohol and water. If the haze is still there use a finishing polish to bring back the shine.
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      07-20-2010, 03:27 PM   #3
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3M SR is a pretty harsh polish, it will need a finishing polish to restore the shine.
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      07-23-2010, 09:25 AM   #4
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thanks for the feedback guys...
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      07-27-2010, 12:51 PM   #5
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Any progress on this?

You may have removed the clearcoat -- one problem with using a scratch remover is that you do need finesse and you do need to know when to stop (make the compromise of a slightly visible scratch vs. removing the clearcoat entirely).

Hope you didn't remove the clearcoat and that you're able to get the shine back.
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      07-27-2010, 09:26 PM   #6
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I actually ran into this same situation using Meguiar's Ultimate compound to remove overfill paint on a rock chip. Overdid it a bit and think I removed the clear coat since no matter what I can't get it to polish up. Doesn't look terrible, but it's noticable. Any suggestions on a product that may help or am I looking at having a shop spray some clear on it? Thanks.
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      07-28-2010, 03:30 AM   #7
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Quote:
Originally Posted by 3times3 View Post
I actually ran into this same situation using Meguiar's Ultimate compound to remove overfill paint on a rock chip. Overdid it a bit and think I removed the clear coat since no matter what I can't get it to polish up. Doesn't look terrible, but it's noticable. Any suggestions on a product that may help or am I looking at having a shop spray some clear on it? Thanks.
BMW sells touch up paint which has separate containers with paint and clear coat. Buy some touch up paint and use only the clear coat to cover the area and then polish it to look ok.

PS: I have the kit in the trunk but I never tried it. However that's what I would do if I were in your shoes.
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      07-28-2010, 05:24 PM   #8
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Actually that's how I got the point I'm at. I do have some touch up paint/clear coat. The dull spot started out really small, so I applied a layer of clear over it. When I sanded to blend the edges (very carefully with 2000 grit) it just made the spot bigger because I needed to sand long enough to make it smooth - that it ate through the clear again, only a slightly larger spot now. I'm hesitant to brush clear over an even larger area. Tried Zaino Z5, Z6, ZCS and Mother's wax with little improvement.
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      07-28-2010, 06:09 PM   #9
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After wetsanding you need to follow up with a fairly aggressive polish. Then step down to a less aggressive polish to get rid of the hazing left from the first step. This needs to be done with a rotary buffer. This is assuming that you removed too much of the paint by sanding too much.

Honestly, I would never wet sand a car myself. There is way too high of a chance of damaging the paint. I have a ton of detailing experience, but have always been afraid of going that aggressive.
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      07-28-2010, 10:04 PM   #10
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Quote:
Originally Posted by fisherbln View Post
After wetsanding you need to follow up with a fairly aggressive polish. Then step down to a less aggressive polish to get rid of the hazing left from the first step. This needs to be done with a rotary buffer. This is assuming that you removed too much of the paint by sanding too much.

Honestly, I would never wet sand a car myself. There is way too high of a chance of damaging the paint. I have a ton of detailing experience, but have always been afraid of going that aggressive.
Completely agreed. Wetsanding is an art - I've attempted it with decent results on a couple of old/test/"donor" cars just for the experience, but even after getting some decent results I don't have the guts to try it on a car that me or someone else cares about.
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