As it relates to liability, I always tell prospective clients, that there is always a calculated risk involved in "paint rejuvenation" of automobiles. If I turned down every car I took a risk on, I would do ZERO work. That is why they call it experience. I just removed a scrape for a lease return of a 2013 BLACK CTS. I worded in the small print that the panel needs re-painting but I will attempt sanding and buffing. I also stated: That the risk CANNOT exceed the gain. I also estimated it 60.00 dollars higher for my additional risk involved. I was successful this time and in most cases, I prevail. If the client understands going in, I can do the work in a less stressed fashion. Clauses can and should be on every pre-work estimate. I also almost NEVER drive any clients cars. But in the 42 years in business, I have had many little stupid things happen that I had to pay to fix, That is the cost of doing business. Taking a risk is about making money. Taking a calculated risk based on your abilities is simply SMART. I have tried to operate "smart" the past four plus decades. From my mouth, to Gods ears. If you don't trust your abilities, on certain jobs, take on jobs you can accomplish.