I have search and found nothing. I was going to get this done but some other modifications were on my list hence kept this on my long waiting list.
And found this article describing terraclean....
http://www.oilem.com/terraclean-and-...aning-systems/
And last paragraph is referring to wallnust blasting.
PS: I have crossed terraclean from my list!
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F36 Xdrive for her - HUD, park assist, heated steering wheel, rear camera, Apple car play
F36 RWD for him - HK, M sports pack, GTS tail light, Apple car play