I normally only detail my own cars, but sometimes my neighbors or friends ask for a wash and wax. I "wash and waxed" my neighbor's 2005 Tahoe for $30 the first time in its life a few months ago, and it is really disappointing having to put twice the amount of work as one of my cars into it and have it come out just okay. Today, I washed and waxed (well, I guess it would be called "wash and seal", considering I used AG SRP) my neighbor's beater 2000 Ford Explorer. Not only did it have paint burns everywhere from a hack, but the entire roof clearcoat was failing, the hood was matte, there were horrible water spots from sprinklers all over the paint and glass, and the whole car had heavy swirling. Oh yeah, did I mention it was black? It sucks seeing all this hard work go into a car like this. It sucks more knowing it only has 86,000 miles, but that's a whole different rant. Sure, I could have said no, but they're friends of mine, hence the $30 charge. Hopefully this motivates them to actually sort of care about the car? 
