Hi there
like a said in previous, I have 20 years experience with paint and body repair and 100% understand the process on applying ceramic wax, the supplier offers a 4 year gaurentee as do most on a proper ceramic wax not just your cheap super guards, I myself being a paint professional working on high end vehicles thought waterless wash would scratch your paint but after extensive testing it is actually a brilliant product, I also stated the word cosmetic detailing which means no where near the cost of a detailing job of around £600. We would easily be able to apply the waxes properly in a 3-4 hour time window also tested and trialed the wax we use is superb but like you say the wash and touched would also be great
thanks for your feedback