Idk if this is a stupid question, but if you travel to a different state, do you have to be within their tinting laws or just your home state? I never really found that out.
Your buddy could not get inspected because in Guilford County it is really strict about emission and tint compared to the other counties surrounding Guilford. I know for a fact that in Forsyth County i can have 5% all around and still pass inspection.