Kristen,
Thanks. I have tried several of the so called latex super whites and such that are supposed to last and it takes longer to get it on that it lasts. One batch did last almost a week before I started seeing cracks in it and that was duing the Summer so I figured it wouldn't take our 110+ heat. We used to get a tire stick when I was a kid that you used to paint the white letters and it lasted great, but they don't seem to make them any more. Some places I have called remember them but said they haven't seen them for years. We have a couple of arts and craft stores around here and I may talk to them. I hate spending hours doing this and then it lasts maybe two days.
Ron