I found out that if you save too many paints to the global paint list, the game will take longer to load them all up, until it takes too long and crashes. If I want to delete them, just to make it load faster, should I do it manually for each paint, or just clear the cache instead? Any information on this would be most welcome.
Clearing the cache will clear all the globally saved paints. Stuff still on cars will be retained in their respective slots, and can be grabbed again to make a global paint again.