Heh.  The main reason I'm going with procedural is to allow the lighting and camera direction interaction of these sorts of materials.  To get that pattern that changes with the direction of light and the direction of view, I'd be using multiple texture maps and some crazy node stuff between them.

Actual drum wrappers are very much about materials that change color and luster radically with small shifts of viewing position or lighting angle.  So impossible to scan or photograph usefully, and (to my mind) difficult to paint.

I'm better off, really, using painted texture maps for my grime layers and logos, and using the procedurals to generate fairly simple patterns (like the glitter look) that are within their capabilities.

That said, I've kept playing with the one above and it's gotten to a rather nice fish-scale look.. Not anything I've seen on a real drum, but something I believe as a drum finish at least.