I’m thinking the steel epoxy and similar products are maybe the better way. In any event, if it’s pitted, I don’t see how any of these “solutions” would be effective other than for a very short period of time until it crumbles, peels off, etc. I honestly don’t know how one might semi permanently repair the pits without cutting or molten metal being involved. I’m just about the last person to ask when it comes to metallurgy and/or repairs thereof.