[violetbloom]

My team is sewing them on this year, too. It looks nice and, since it is not paint, it will not chip off during the competition. But hey, it's up to you how you want to put your numbers on.

Hm...are you already trying to spray-paint directly onto your bumpers? Maybe you should test it out on scrap pieces first, just to see how that works out. If you don't like it, you can always go for another method. But if it's too late, just hope for the best.