Two Dimensional Thinking...
Every MOC builder has a different method for attaching stickers to their models, all varying in cost and crafting skills required to execute. For the custom labels for each of my models, the process I've outlined tries to accomplish four goals:
What I've detailed below may not be the best methodology for smaller stickers, or a larger MOC layout. But, for regularly placing labels on black 2x4 tiles, it seems to do the trick!