I've seen people on here complain about the rear seats not being leather. The faux leather is actually more durable than the real leather so I like it.
I just cleaned my plastic doors and they look as good as new. Didn't have those marks you have but it's worth a try with some Turtle Wax Interior Protectant
and a toothbrush-to get between the tiny grooves. QUOTE.
I also prefer high quality vinyl.It is a much better product for a car seat than leather.There are plenty of '60's muscle cars with the original vinyl that still looks great. Easy to clean,long lasting and will show very little wear.
I have had 4 Mustang motorcycle seats that suffered WAAY more abuse than any car seat and they all still looked like new when traded. I dont get the whole leather seat thing.It is good for jackets though.