I have thumb drives full of before and after pics that I keep on file, not only for the car owner, but also to cover my own butt. Luckily I own an original paint Mach 1 so I'll use that for measurements on the customer car I mentioned above. Otherwise you run into issues like I mentioned when customers don't want to spend the money on what's needed. There are other problems I won't get into with this car as well that the customer doesn't want to fix properly, so I document it again to cover myself. It's not always the shop,,,,most people just won't or can't spend the coin. It's not cheap to own these cars anymore. Unfortunately you spend a small fortune just to buy a basket case nowadays, and then people quickly find out what a "real" restoration costs, so corners are cut, or the project sits and doesn't get finished.