I've used Color Guard for years on my pinpoint vinyl convertible top and it looks great at 21 years. It's a lot more expensive than Armor-All. First I use Armor-All Cleaner. I use Meguiar's plastic cleaner and polish on the plastic rear window and it too looks much younger than it's age. --Roger van Hoy, '55DeSoto, '42DeSoto, '66Plymouth, '73Duster, '81 Imperial, Washougal, WA