| If you put the labels in a sheltered place, they'll easily last a year on a cylinder. Those on the outside of stages will obviously take more of a battering, but the home-done labels don't seem to be any worse than commercial (Halcyon or car letter decals) providing that none of the edges are folded over when they're applied.
I think that making a couple of spares for the toolkit is an excellent idea - I'll add it to my "to do" list! - it certainly beats trying to cut "21" out of black gaffa tape to add to a stage at short notice.
David |