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      10-14-2017, 08:36 PM   #1
Iwantbmwm3
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How to remove these stains?

Hi,

My 2011 e92 M3, mineral white has these stains near all wheel wells by the rocker panels. i have tried several times to remove them, but it wont budge. Today i tried dawn + vinegar, simple green, and wd-40. I am out of ideas, any help would be appreciated.
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      10-14-2017, 08:39 PM   #2
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Clay bar is your friend here!
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      10-14-2017, 10:48 PM   #3
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Goof off..
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      10-16-2017, 11:14 AM   #4
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try claybar with plenty of lubricant.
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      10-16-2017, 12:18 PM   #5
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Nothing you listed is abrasive. Try something like clay bar or a swirl mark remover. If that doesn't work, move to something more aggressive.

If in doubt, take it to a professional.
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      10-17-2017, 10:27 AM   #6
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I wanted to try the methods i tried first in hopes it would work.

Thanks for the tips everyone. I will try clay bar next.
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      10-17-2017, 12:16 PM   #7
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clay bar, iron x, tar x, lightest to then most aggressive polish
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      10-18-2017, 12:34 AM   #8
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Should i try a fine or medium or heavy duty clay bar for these stains? Or recomendations on a specific brand? Im looking at chemical guys but not sure what grade to get.

I bought the car 6 months ago so not sure if its ever been detailed.
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      11-13-2017, 02:55 PM   #9
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I bought chemical guys OG clay bar (yellow) and clayed the car this weekend. the stains didnt budge. not sure if i didnt get a stronger clay bar of if i need to take it to a pro. the stains are still rough/bumpy.
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      11-13-2017, 09:26 PM   #10
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Quote:
Originally Posted by Iwantbmwm3 View Post
I bought chemical guys OG clay bar (yellow) and clayed the car this weekend. the stains didnt budge. not sure if i didnt get a stronger clay bar of if i need to take it to a pro. the stains are still rough/bumpy.
Try Iron X next.
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      11-13-2017, 09:34 PM   #11
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Quote:
Originally Posted by Iwantbmwm3 View Post
I bought chemical guys OG clay bar (yellow) and clayed the car this weekend. the stains didnt budge. not sure if i didnt get a stronger clay bar of if i need to take it to a pro. the stains are still rough/bumpy.
Rough..Bumpy ? That sounds like a bad paint job to me..
Was your car previously re-sprayed ?
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      11-15-2017, 12:26 PM   #12
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Quote:
Originally Posted by ///M Power-Belgium View Post
Rough..Bumpy ? That sounds like a bad paint job to me..
Was your car previously re-sprayed ?
i am not sure. i bought the car 6 months ago. the indy that did the PPI didnt mention anything about repaint, although i am also starting to wonder the same. Only thing thats odd is that the rest of the side skirt is smooth. its only rough/bumpy around the wheel wells.
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      11-15-2017, 02:54 PM   #13
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Almost looks like a poorly prepped respray and the clear/paint is failing, or some sort of overspray.
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      11-15-2017, 02:55 PM   #14
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These areas are very susceptible to wear, and therefore more susceptible to staining.
I think and painting in that area would be noticeable with the gaps.

I would try Maguires ultimate compound with a light cutting pad on an orbital machine. Not aggressive enough to cause problems, but should clean up the surface stains.
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      11-15-2017, 08:15 PM   #15
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Quote:
Originally Posted by doogee View Post
Almost looks like a poorly prepped respray and the clear/paint is failing, or some sort of overspray.
Like I said above in # 11 . I think it was a quick cheap overspray..
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      11-15-2017, 09:22 PM   #16
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Quote:
Originally Posted by doogee View Post
Almost looks like a poorly prepped respray and the clear/paint is failing, or some sort of overspray.
That's kinda what it looks like to me also, try some paint thinner on a rag and wipe it a couple times to see if it comes off. if its not a smooth surface, then it was probably repainted improperly.
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      11-21-2017, 04:35 PM   #17
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That looks like failing clear coat to me or road paint that kicked up. Maybe wash the car or at least the rockers and lower bumpers and take a few new pics in better light, it's a little hard to see what's going on. If possible, I would try some Meguiar's compound or some clay bar like others have suggested. If you can seem to fix it, then a visit to your local detail shop may be necessary.
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      11-21-2017, 08:39 PM   #18
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Looks like text book failing clear coat after one of those "spot-fix" repairs that bodyshops and dealers use for quick jobs.

Try a cutting polish like M205 with a mildly cutting pad. Might fix it enough.
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