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      10-06-2012, 10:55 AM   #1
RAIF414
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Impurities on the Rear bumper

My problem is this I have built up contaminates on my rear bumper, They look like little rust spots(which can't be the case as the bumper is plastic). I have searched the forum and clay seemed to be the answer; however I have clayed the car from front to rear and only a minuscule amount came off of the rear bumper. The rest of the car looks awesome, and the paint is baby smooth, so I would like to rule out operator error on the clay bar. Question is what is the next step? Rubbing compound? wet Sanding?
Picture of only a couple of the spots

Picture of the rear deck lid after polishing
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      10-06-2012, 11:35 AM   #2
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I would try some iron x first or more aggressive clay but you said let's rule out operator error. If iron x doesn't work then a polish would be required. Try meguiars 105>205
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      10-06-2012, 11:48 AM   #3
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It looks like metal particles that are embedded into the paint.

As suggested try Iron X or more aggressive clay. Note that more aggressive clay will cause swirls so you may need to polish afterwards.
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      10-06-2012, 12:25 PM   #4
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The bumper is plastic, but the embedded parts are metal. They rust over time. Use IronX and you should be fine.
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      10-06-2012, 01:00 PM   #5
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Ironx..agressive compound... polish..

Honestly its a good idea to keep the rear section of this car clean it sees the most build up of contaminants
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      10-06-2012, 08:41 PM   #6
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Quote:
Originally Posted by Yolkster View Post
Ironx..agressive compound... polish..

Honestly its a good idea to keep the rear section of this car clean it sees the most build up of contaminants
Usually embedded particles like that are from the car being shipped on a truck or railway backwards.
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      10-11-2012, 07:28 AM   #7
RAIF414
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Thanks for all the replies, I am going to get some IronX and then post pictures after the rear is polished.
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      10-11-2012, 08:50 AM   #8
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It happens more often when you run with high flow cats or catless.
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      10-16-2012, 11:23 AM   #9
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Everyone else is pretty spot on. IronX plus a good polisher setup should clear it up.
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      11-17-2012, 01:53 AM   #10
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I've got these rust spots on the rear bumper of my 2 month old AW M3. Were you able to remove them with the above suggestions?
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      01-03-2013, 05:03 PM   #11
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Quote:
Originally Posted by THE TECH
It happens more often when you run with high flow cats or catless.
Happening to me Matt so clay it?
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      01-04-2013, 10:45 AM   #12
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have you heard of IronX?...give it a try...it should take care of it
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      01-05-2013, 09:00 PM   #13
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Clay bar took mine out.
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      02-13-2013, 05:38 PM   #14
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I have this crap all over the back of my car. Where is it coming from? My exhaust is stock.

Which Iron-X works the best?

http://www.autogeek.net/carpro-iron-x-cleaner.html
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      02-13-2013, 05:44 PM   #15
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Check out this thread:

http://www.e90post.com/forums/showth...ghlight=iron+x
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      02-13-2013, 05:56 PM   #16
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I have the regular Iron X spray and the Iron X Snow Soap.

Regular Iron X works well for removing heavier iron deposits but it gets expensive if you want to use it regularly. You use up half a bottle (250mL) on one car, use it twice and you're out. Iron X is not a replacement for claying so some embedded stuff you still need to clay out.

The Snow Soap is nice in that you can wash the car with it. You use very little per wash. It pretty much saves you a step because you don't need to wash then iron x and then wash again. But it is not as strong as regular Iron X and it will strip wax off the car so you will need to re-apply that.

Do not use Iron X on bare metal - bare aluminum, iron, steel etc. It will eat and pit the surface!
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      02-13-2013, 08:52 PM   #17
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Good info Thx!
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