Stuff works a treat!
Quite a big difference, i Might try some of that myself :)
my mate used autosol with good results but i used meguires and its just as good.
I do a lot of metal polishing as I have several classic British bikes and Autosol is the only metal polish I use. On really grubby tail pipes I use really fine wire wool and Autosol to get the crap off the just a microfibre cloth and Autosol to polish up.
I haven't used it before but safe to say I will do now lol
I tried the Autosol method once and it worked a treat. After about a week the pipes were black again. :keule:
if you want to take it to the extreme you can follow Pommes guide from R32OC..
How to clean exhaust tips by Pomme - Car Care and Detailing - R32OC | VW Golf R32, Golf R and other .:R Vehicle Owners Club.