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Meguiars speed glaze # 80 takes it right off I use show car glaze after the #80 and the paint is clean and water spots are gone then a good carnuba wax. I use a towel and the wax on wax off system I don't trust myself with a buffer. Keep it waxed and the water spots won't stick again they just wipe off. On the windows use rubbing compound ( the finest you can find from schucks or autozone) then rain X after the windows are clean to keep the water spots from sticking again. I hate water spots and it took me a long time to figure out a system that works. A tip on using glaze don't let the glaze dry like you would wax wipe it off before it hazes and it make the a lot job easier.



Last spring #80 easily took off sun-baked contaminants like water spots, sap etchants, bird poop etched in, etc. And it's really easy on the paint.
I tried #7 last weekend. I applied it to the whole car and it dried up - not fun to remove. NXT wax & #7 gave excellent results though.