What kind of wire are you stripping? If it's a solid core or braded core wire the best thing I've found is the good ol utility knife, if you know how to use it. You can't strech the wire out and run the knife along the wire like I've seen so many people try to do only to get frostrated and give up. You have to lay the wire on something hard like across the top of a vice, hold the knife so it cuts into the insolation and pull the wire under the knife. Depending on how long the wire is I could do up to ten lbs of wire an hour using this process. If it's electrical cords, I just sell them as #2 insulated copper.