Strop only before shaving. If you strop your razor immediately after shaving, any loose metal parts can break off and penetrate the leather.
Stropping is performed at a flat angle with the back of the razor laid on the strop; the razor is drawn in the direction away from the body. The razor is then turned over on its back and drawn in. Changing directions without turning the razor over can make the blade become round, losing its cutting properties as a result.
A light stropping of a Cut Throat Razor on a proper leather strop will help to maintain it for many years of satisfying use. Razors must be properly cared for in order to ensure their performance longevity.