I am about a month into learning how to shave with a straight razor. I am noticing some tugging and pulling with my razor now that standard strapping is not taking care of (prior to each shave I do ten passes on poly webbing and fifty pass on leather). I suspect poor shaving and stropping technique has dulled my blade. I want to try refreshing my razor and had some questions. Is there a difference between what chromium oxide and diamond spray will do? Or are they just different means to the same end? I also see that there are different grades of diamond spray. Do people use multiple grades of the diamond spray to get finer edges? Finally, would you recommend a noob like me try diamond spray or chromium oxide first? Thanks, Ethan