Once you done nano coating on the car then water, acid rain, dangerous air particle will not affect the paintwork at all. Nano coating works like anti-static which means air dust will never be able to put on the cars paintwork. If you do get a scratch on the paintwork, it will easily disappear with a bit of light polishing.
Car coating preserve your car paint and it is not going to be damaged by bird droppings, scratches, stone chips, dust, dirt, bugs, tar or graffiti paint.
It provides you high durability, high gloss, hydrophobic properties, UV protection and self-cleaning capabilities.