I have the shadow trim on my 4.8 and it used to be discolored. I saw the advisory to use Megs #9 and I bought that, tried it and was not happy. I then tried the Einszett polish. It was a little better but not what I wanted. Next up was Ultimate Compound by Megs. Much better results. I was doing this by hand with a foam applicator. It takes some elbow grease but you will get the results you need.

I am planning on getting M105 next from Megs. They sell this in an 8 oz size so you can get it for under $10. I am thinking the 105 might need less effort than the UC but not sure.

I also spoke with a person who used Adams polish and a Porter Cable to clean up his trim. Using a machine is def the way to go as he was very happy with the results.

I would not waste your money on anything less aggressive than UC or 105 if you are doing this by hand. The No. 9 did not budge the discoloration at all.

Just my .02
Hope this helps everyone.

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2006 X5 4.8is