My polyester or nylon or similar man made fabric that covers the majority of my Scat Procar yellow and black bucket seats has black fingerprints, streaks, and other grease or "shop grime" marks on them. They were out of the car for most of the shop time, but DAMN! Anyway, I can test an "inconspicuous area" to see if there are any negative effects (other than weakening the material) of any cleaning products or techniques that may be recommended by any of you and I absolve all advisors who offer sincere recommendations for a way to clean them. Here's a couple of older pix. Just imagine shop funk grease marks on my beautiful yellow fabric. PLEASE HELP!