Nu Finish vs Liquid Glass vs Meguiar's boat/RV Cleaner Wax

I've tried meguiars ultimate liquid and although it went on easy it was a real problem to get off, bad streaking etc. Needs a polish with microfiber after to get streaks off, lots of work. Best kept for the sports car not the rv. May not show streaks on white rv but avoid on full body paint or dark fiberglass. Nu finish works better but is quite chalky and smelly and will leave white marks on dark plastics.