How to Sharpen a Knife With Sand Paper. Part of the series: Home Improvement & Maintenance. In order to sharpen a knife with sandpaper, the first step is to clean the knife, and different grades of sandpaper can be used to hone the blade to a very fine point. Find out how to avoid damaging a knife blade when it's being sharpened with help from a home remodeling specialist in this free video on sharpening knives.
