You definitely want one strop with nothing on it for use before and possibly during each shave. You could employ a strop/leather conditioner to keep your strop supple, that’s what the neat’s foot oil mentioned by Tony does. However, this is still not “pasting” a strop. When folks paste their strops they are smearing on a abrasive compound that is meant to actually grind or polish the razor as the stropping occurs. It is spread VERY thin over the leather and is by nature a very fine grain size/mesh equivalent. And it will act exactly as a high grit stone, except much cheaper and much easier to use. Yes, you still need the plain strop, but make your own paddle strops and then paste them and you will be amazed how cheaply and easily you just got a killer edge on you blade. .5 micron Chromium Oxide is pretty much the standard around here. I’ve just started pasting with .5 micron and 1.0 micron diamond and to tell you the truth, don’t see any reason for anything other than the CrOx. It really is that good.