nope you can strop your kitchen knives if you want. wash them after ward. Steels are used for a couple of reasons one being because they wont get wet greasy etc and get ruined in the kitchen or butcher shop. A strop was originally used for razors, they are super hard and brittle steel, they were used to remove, straighten and polish the minute steel edge that forms when sharpening. A steel was used for the less hard knife steels, both do similar jobs on different types of steel. You can polish an edge on a number of things, i have several glass rods that i use also for the same purpose. Sharpening is what you do to get the edge, stropping or honing polishes and keeps the edge sharp until it wears to the point of having to re-sharpen again.