If you put nano silver in a small plastic spray bottle from the dollar store, you can apply it almost anywhere. You can use nano silver from a spray bottle as a deodorant. Most commercial preparations contain toxic substances like aluminum. Pure silver in distilled water has absolutely no harmful properties when applied topically.
You can also spray 10ppm nano silver as a disinfectant, for example to sanitize counter and cabinet surfaces in your kitchen and bath. Simply spray on, allow to sit for a few minutes, and then wipe off.