next time you should spray your white as well, as I assumed you taped it off in the first place, as well you could have probaly found some stencils for the jolly rodger and such as well as the numbers. but overall at least your learnin and trying.
That looks pretty damn great, haha. Personally I would sand it so that the brush strokes weren't as evident and then clear coat it with a rattle can clear, that's just me though. I like the hand done look!