I would say pongo is your best bet or uberstickers...
I've heard good things about the stickers and applied some already. I don't have my control panel set up yet so I can't tell you how long they last with normal use, but I imagine using normal spraypaint may rub off over time. The stickers don't look like stickers when applied, you can feel the sticker if you rub your finger around it.. but seriously, who does this? Usually you just tap the button and the button