I was detailing my dad's neighbor's 1988 Cadillac earlier this afternoon for a much discounted price of $50. This included steam cleaning, engine cleaning, leather cleaning, interior fully dressed, wash, clay, wax. So after I get done the neighbor is complaining about these serious water spots/etchings that were on the trunk before I cleaned it. I told him before hand that for $50 that service was not included. He wasn't willing to pay more. Should I have gone ahead and removed those?