Something I have not tried: some of the car washing soaps have wax and are supposed to wash and wax your car in one step. Perhaps washing the salt off with one of these products will leave enough wax to serve as a rust preventative, without having to wax your bike and winding up with chalky dust trapped in the crevices where it may serve to hold salt.

Also, I believe the latex glove thing works because when your outer gloves get wet they lose their insulation value.