I m pretty new to truck washing I do a few trucks on the weekends but I was recently asked to wash some school buses. I washed this guys rv two months ago and he called me asking if I wanted to wash buses. He had his mechanics washing them but it is getting to be to much for them. I think they had a drive threw wash. I could really use the business if anyone can give me some help. I dont know what to charge or if their is a special chemical to use. I do have a hot machine.