As newbie to polishing other peoples cars other then my own and even then only having to do it once since I keep my car in such nice condition, how do I go about determining how much can be repaired and how much to charge based on that. Without having done a ton of cars before it is hard to say how long something will take and if I can repair it all the way. Just starting off, clearly there are some thing I will have a hard time with that other people on here can do. How do I know when to just say I can't do that job but at the same time when I turn a job down how do I get experience?