Generally speaking, yes? It wasn't like you could make out the specific lines and ridges in the fingers that were present early on, but just sitting there in the camper looking out thru the window even up thru the fall, you could see that a 'hand' had been against the glass there. If that ever happens again, I'll hopefully get into documenting the event far more thoroughly and with longer follow-up. But overall, yes, while the material stuck to the glass washed away within a month or two <?> the image / impression of something handlike remained thru the end of the camping season. It was rather fascinating to look thru the glass many months later and see that you could still identify that a hand had been placed there. That's probably when it dawned on me that it was the oils of the hand doing that.