This isn't about a drum or about an edge !
A few years ago, I took a vintage duck call to a wood carver, I asked if he could copy the call as I would like to give it to my duck hunting partner as a gift. A few weeks later I got a call from the carver, he said that it was too difficult a task and could I stop by and pick up the call. I went over to pick it up, he explained that he had spent some time trying to carve it and though he should get compensated for that (ok, that's fair) he then went and got my vintage call. When he handed to me he said oh by the way I painted it for you (black enamel). I won't go into detail as to what I said next. It was destroyed of any value !
What I don't understand is what gives a person the right to deface someone else's property. It's simply wrong.
In the case of the drum a removable sticker maybe ! At least ask permission before doing something like that ! If you want the advertisement give your client some business cards to hand out.