If you make the final clearcoat thick enough and pay special attention to the edges there shouldn't be any problem, unless you leave it standing out in the rain for longer times.Looks awesome! I also covered a frame in Comics years ago. The bike is still with us.
I then was thinking much about using paper because I was afraid it might come off again when the bike gets wet. Did you have any issues?
I would love to try it again.
Maybe this Rocky is the one
Also you should choose a final coat that hardens enough to really protect the paper, as any damage creates any entry point to water.