One of the secrets to passing in public is the I don't care what other people think attitude. You husband could start developing that by remembering that if anybody ask about the nails, simply respond that he lost a bet with you. That will get a good giggle and everybody will move on with their life. Most likely that line will never need to be used.
I am near phoenix but I have never had a pedicure and no longer own a pair of sandals to show off my feet so I am not much of a resource for that type of information.