In used it weekly in Ga. and monthly up north until winter comes. This was the case on my Mothers 1991 Plymoth Laser which she just traded in about 9 months ago. THe paint looked great. I use Zymol for the most part on my vechiles a couple of times a year and it does fine. I would be more impresed with an easy way to remove bugs from painted surfaces. If a company comes up with a product that can do this without hurting the paint it will make a fortune!!!