Interesting. Does it have a texture or anything? I wouldn't think Athearn paint is lacquer-like; usually lacquer doesn't come off in isopropyl. That leads me to believe this is original Athearn paint, not a custom job. I am no means an Athearn Expert, though. However, this happened to me once before on a different model. It was on a Branchline car. The body color came off with isopropyl, but the striping didn't. I think the stripes were pad-printed, but I used acetone to get it off. There was a faint line where they used to be, but it was not noticeable after I repainted the car.