My daughter (10) found my special work flashlight a few days ago; it has a blacklight mode. It was evening, so she went around the house looking for things that glowed. She pointed it at my 81 MHR, still in the living room awaiting Covid 19 to go away and I got a big surprise. In normal light, the bike is super clean and very shiny but under blacklight, there are large stains on the tank that must be from fuel spills in the past, the engine had lots of little bright spots where I thought I'd cleaned but obviously not done a good job. Every trace of engine oil on the bike shine brightly! A 1st world problem...