So, I realize this might be quite a bit late, but one of my favorite ways to quickly cover a bill is to use a water balloon. You can cut the round part off the mouth of the balloon, then just stretch it down over the bill and cut to fit with a small razor. Works like a charm and saves you from having a sticky mess if your bodies are sitting taped for a long time. If you have a problem with the balloon not fitting on the bill exactly how you want, take a painters q-tip and outline where the bill meets the body in your base color - then the balloon can cover part of the body without missing paint.