Study it and you should be able to figure how it turns... Get it cleaned up before you go out or you will not do a good job.. I use a 4 1/2" Angle-Grinder with a thin Cut-Off Disc on it, held at a low angle..about 30 Degrees.. It will take all the rust off and NOT scratch the steel.. It won't even take the black oxide off, under the rust..! Leaves a very good plowing surface.. Wear a Mask and safety glasses..