I play a lot on some very dark stages, and I like roasted necks, which are kinda dark. I've tried stickers, but they come off, or curl up at the wrong time. Anyway, what I've come up with is this:
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It's Rustoleum spray paint (a very thin layer), Super permanent Sharpie, and then poly over the whole neck (I do it when I do the finishing on my necks - I build my own basses). It takes a bunch of careful sanding of edges and such, but you can't actually feel that it's there, and it's not coming off. A few of the stages I play on have overhead black lights - when it's dark, those markers glow like nobody's business.