Kind of relates to this subject
 

Hey guys just got my car back from the performance shop and the guy who worked on my car knows his stuff but has a lack of detailing the car or even returning it in the clean state he recieved it. Anyway he used red sharpie as I imagine on the big rubber connectors of my spark plug wires that connect to the coil packs. Soap and water with hard scrubbing didn't work. Any suggestions ? Thanks

Denatured Alchohol should do the trick. Be careful not to use any strong chemichals that will promote corosion of the metal and or rubber.

Ok thanks for the help

Also WD-40 will take it off

thanks will try tomorrow when it finally stops raining

Cool let us know.