Several years ago, I took a pair of fenders to machine shop to be vatted.(sort of the poor man's chemical stripping)I asked them what it would run and they quoted me something like 20 bucks. Said to come back next day. I went back and they pulled the fenders and said to leave them another day. Go back the next day and thay told me they still were not completely clean and give another couple of days... anyway, you get the idea. Finally, the declare them good and bill me $180. They said it cost $20 every time they pulled them from the vat. I felt like I got hosed! I was just following their instructions as to when I should come by and see if they were done.