I am so happy to finally find this thread! I have the same exact problem. and if we need to state the problem it is:
Water and other spots will not be removed easily from the car if you have Zaino on it... That is a big minus for this product ( I can't say for other products)...
Yesterday I rinsed my car with water and left it, that was big mistake... I got water spots all over the car and was unable to remove them till now... still don't know what to do... Tried the Z6 but does nothing... While I reward Zaino for the shine results, I can clearly say this product is very poor when considering it for water spots and probably other type of spots... These things for some reason go into the Zaino film and stay there... I had the Touch of Class made by Nissan on my car... some on this forum call it sham and crap but guys all I can tell you, my car never had any issue with water spots nor dust... I do not know what this TOC product but I guess I need to go back to my dealer to re-apply that material... I do not know else what to do... is there any other product out there that is more resistant to hard water spots...? How can I get them removed now? I have a few coats of Z5 and more of Z2 and hope I do not need to remove them all!
Thanks.