hey boys, so the person who had my car last, didnt do anything about the exhaust leakin in the car, and now my ceiling, and under the window is slightly yellowish-brown (im colorblind....really bad) any tips to clean it?

try 409...i had a flared exhaust tip on my 2002 and carbon built up on the rear bumper. I used 409 on the rubber and metal, but im not sure how it will hold up on cloth, wont hurt to try...yellow brown is already bad enough as it is...