Intermezzo said:If it's the carnauba that is causing the yellowing effect, then what about waxes that do not contain carnauba, such as 3M & MGC? Would these waxes be immune to the yellowing?
I know the 3M contains carnauba: here is the interesting MSDS on the Show Car Wax: 3M Show Car Wax MSDS]
I also believe the Gold Class contains carnauba. AFAIK, it is a carnauba/poylmer blend. GC was another wax I've heavily used in the past, so my 'yellowing" experiences apply to it as well, along with #26, and Medallion from the Meguiar's line.
This is unrelated to yellowing, but while looking at MSDS sheets, I found this to be very interesting! notice the ingredients on the gloss enhancer spray. 100% water!!! LOL!
3Mâ„¢ Perfect-Itâ„¢ Gloss Enhancer MSDS