Mach 1 Any special care needed to protect the decals when washing / waxing?

I wash mine with Turtle Wax soap and when I wax my Mach, I wax the decals too. A similar question was asked about the decals and some other guy posted he knows a Mustang Restorer that says it's bad to wax the decals. So, I guess take that for what's it's worth. I'm gonna keep waxing mine. No problems so far.