Join Date: Jun 2013
Location: Indianapolis, IN.
Any of those products, except the Detail King product you linked to, do not have dyes and are only dressings that will wash / wear off in short time.
Something with a dye is the way to go. I have never used that Detail King product but I have used a product on black plastic parts that is a dye and it worked great. I would order a bottle of that, get everything really clean, and do a test spot. What do you have to lose, it already looks bad.
1967 Sports Sprint 289 Coupe