I just bought a 2006 PT in Feb with 300 miles on it. Even rain leaves stain marks on the upholstery
I have a post out there about seatcovers and there is a post from a fellow PT'r on here that says he cleaned the whole seat after snowflakes left marks. That's what I did so there would be no water marks, let dry, scotchgard, and then bought some nice seat covers at Walmart that match pretty darn good. Now I don't worry about the seats. I can easily take the covers off if needed. It was the best $37 I spent and they don't move around.
Front Seat Covers for '06 Touring