[thstone]

Instead of magnetic numbers, I'd suggest using vinyl stick-on/peel-off numbers. Yes, they are one-time use, but they are cheap, won't damage your paint, and won't fall off. They go on in less than a minute and come off just as fast. Any local sign store should be able to create them for you, no reason to use an expensive "racing" online store. Mine cost $1 a sheet. I'd be glad to send you a sheet (with number 254) if you wanted to evaluate them and try installation/removal for yourself.