LEGAL ADVISE

Congrats on opening a shop. This is a good learning experience for you. You know as well as i do that bad news travels farther than good news. With that being said i ran a body shop for 9 years and ive seen damn near everything. If this was a verbal agreement only and you werent a licensed shop at the time then you have no legal requirement to warranty any body or paint work. Its basically a he said she said scenario unfortunately. Sounds to me like you have your ducks in order. Keep all receipts and a detailed list of what he wanted and what you did including what you didn't charge for. Make sure you keep dates of conversations with hum regarding repairs and issues and when you spoke with him. You cant make everyone happy and not every job is a money maker. You cant let that stop you from continuing. Tbh i highly suggest you part ways with him and lawyer up. And when and if it goes to court for some reason and you lose you put a gag order on him for your business sake