r over 3 or 4 years, no they do not do the same as a 6k paint job, but they can make an eye sore look average or better on 10 year old cars, the only real major problem i have had with them is flaking of the paint, they will swear that you need not prep the car yourself and if you do they will void the warranty, personally on a car for myself such as the porsche i will take my chances and prep the