All my tools have no arrows on them either. When I was working for ATC Lasham a few years ago, a Polish Connie at Lasham was caught nicking waste Jet A1 and taken to court. Shortly afterwards HMRC paid a view to ATCL's Southend MRO. A lot of people were bricking it as the vultures would be about any aircraft being defuelled for tank entry. 4 cars were chosen (Obviously diesel) and two were found to be non compliant and a 500 pound fine with impounding without payment. My mate was one of them, that was a classic when they asked him to test his car, his reply was "Don't bother, it is red diesel".