I always thought the best bit was the rampant lion in the middle of the Scots version.
I've often thought of painting a design on my tank using the reflective paint you see on traffic signs, then putting a heavy coloured clearcoat over it. The effect should be that it looks like the clear coat until light hits it right and the design flashes.
In fact, they do make reflective DECAL material, which comes in many colors. It is easy to work with, and retains it original color until night time and a head light hits it, whereby it light up as white reflective. Most sign companies carry it or can order it, and it is a lot of fun for creative types.
