Got the idea from , did attempt tire size numbers but they were to shallow, just have to see what it looks like during rotation. Got the tire pen at a local Cyclegear store, some auto parts stores carry them also. Sorry about missing tank & nose, still drying at the painters, matching Red. Word of caution - if you don't have patients and a steady hand, forget it. It will look like crap and you'll be using the F word more than they did in the Scarface movie.