This is actually the same process that has been used to coat the back of glass to make a mirror.First you must spray a black basecoat for a smooth finish.Once the basecoat is completely dried( I believe you must wait 24hrs,but not sure),your spray the part with de-ionized water(distilled water,has to have a low mineral count),then an activator is sprayed on,followed by the two part mirroring solution(you will notice this step with the duel spray gun),then another spray with de-ionized water,and finally blown dry with air.It's actually a very simple process.The final step would be to spray a good quality clear coat to seal everything for UV protection.It would be great for automotive interior parts as well as various underhood parts too.It should be able to withstand whatever the clear coat is able to withstand,so you would even be able to spray a clean bumper(basecoat/mirrorcoat) and get a nice finish(as long as you don't bump into things with it).It should be as durable as paint with repairs alot cheaper and easier than rechroming!