can you radius a neck with binding on it with out damaging the binding?
I would expect it would be no problem. The problems with binding usually occur when you have to scrape or sand in an area which reduces the width. Thin spots appear very readily when viewed from above. Reradiusing the fretboard is done on the top surface, and won't affect the thinnest dimension of the binding, so thin spots won't be an issue at all. Remember, the binding was applied before the fretboard was radiused in the first place. Just don't sand the width.
Various Strats
Polytone Mini Brute
Koch Studiotone XL
Quilter OD200, 101 Reverb and Mini
1958 National lap steel
Eastman El Rey 1