can anyone recommend any sort of cleaning detergent for combustion stains? at least, i think that's what you would call it. have you guys ever seen those s13's w/ huge as exhaust tips? you see how dirty that one spot is where the fumes from their catless exhaust touches? it's black/brown from exhaust fumes? i have THAT, on my rear a-spec lip. i was a bit angered at first, but i guess it's expected. on a side note, this is the first time its been a problem. i used SHELL for the first time in a while, and thus (possibly?) the problem. Chevron seems to have ran cleaner

thanks,
eric

 

i have the same problem. i use wheel cleaner on it, and it comes right off. just spray on, and rinse off and its gone.

http://www.kleen-ritecorp.com/p-2319...-5-gallon.aspx

honestly, this stuff is AMAZING. it also cleans wheels without touching it, just spray and rinse.

i use 75% cleaner, 25% water mix since its not THAT strong

 

^ sweet! thanks man!