Everything would be the same as regular cars, just expect to be using ALOT more product that your used to. Also, find a good metal cleaner/polish because semi's have gas tanks, grills, mirrors, exhaust pipes, wheels, etc all in metal and it's all visible so your going to want to clean them up. It's going to take you longer to do semi's, but your also going to get paid a lot more. I'd like to try my hand at a semi one of these days...
