I have tried that stuff but to be honest doesn't last very long at all and cost too much. Personally i have gotten best results on plastics like flares, bumpers, mirrors, from using mguiars hot shine- clear tire shine and lasts a good while and heck i have even brought old plastic flares back to life using 90wt gear oil rubbed in. As for the soft top i would use a conditioner made for soft tops.