Hi all, I have a red 1968 300 convertible with the original white top and I would like to hear what the best way to deep clean it without ruining it. Let me know your thoughts. This is a very well preserved example with 20,000 miles.
When I purchased my '62 Chrysler 300 Convertible about eight years ago, I tried "Fantastik", 409 etc. and still had some embedded dirt and used a stiff nylon brush. If you cannot get it clean, consider white liquid shoe polish. Dump it in a plastic bowl and use a 1" foam brush. After going one direction, go the opposite direction after the first coat dries. It has never come off and still looks great.
With age and exposure, the "white" can become a bit dingy that probably no cleaner will remove or bleach out. Hence, the white shoe polish can be a great alternative.
I have a similar situation (a brand x all original 73 Indy Pace Car/white/white top) as it left the factory: I’ve scrubbed it with everything. The 2 best things - “green top” sprayway cleaner & (or) soft scrub. I mask off the areas trim/paint/glass that I don’t want the chemicals touching.