Good info

 

I tried Sonax on some wheels that had been cleaned with Mean Green and then p21s. The Mean Green and p21s would not touch the baked on, caked on, weathered on brake dust. Sonax took it off with some brushing and a thumbnail scraping.

Fortunately a diner that I frequent is about a half mile from a local Porche dealer - AutoAtlanta so I was able to pick up a bottle and try it before I ordered the 5 liter from Detailer's Domain.

http://www.sonaxonline.com/partners/

http://shop.sonaxonline.com/home.php

You may be interested in this thread:

https://www.s2ki.com/s2000/topic/420...well-cleaning/