I would like to start getting a little bit of business on the side detailing cars. I know lots of college kids have done this to get money on the side to work through college (I'm not currently in college, but just using this as an example). But I was wondering, what happens when you get the "bad" kind of customer that says crap like "you put swirls/scratches in my paint", and claims other kinds of stupid damages that you know you didn't do, and tries to sue you or something??!! Like if you do an ONR wash, which we KNOW that it will not scratch paint, but they say you did? How do you do a basic detail for a stranger when you don't know if they are going to be a PITA about something? How do you cover your own hide with people like this? Do you have to have some kind of insurance policy, even if you are just detailing as a hobby? Just wondering what you experts out there would say. I don't want to get into a problem. Right now I'm just detailing for friends/family. Thanks for your input.