Front seat covers in the Camaro, primarily because the driver's side bolster is fraying. Back seat is almost always folded down. No covers in the wife's Buick. It's leather & vinyl. Trying hard to keep the leather looking fresh, using Meg's Gold Class products. So far, so good. Scotchguard on the Camaro's cloth seats and carpets in both vehicles. I use the Scotchguard for household carpeting for all applications. I just apply it more lightly to the Camaro seats. Otherwise, it makes the fabric a little stiff for a few days. The main thing I have learned about Scotchguard is to make sure that the fabric is as clean and dry as you can get it before you apply the Scotchguard.