I have spent about 6 hours trying to clean these today, cleaned with wire brush, then a few coats of hammerite rust gel and then hours of sanding with emery cloth and sand paper. This is how far I got, and if you see the close up, the surface still looks pitted and horrible...is there a good product out there for doing this any easier?
Bench grinder with polishing mop, paint them, wrap them or cover them up with a belly pan! I went down the wrapping and painting route to save on having to continuously clean/polish them
Pickling Gel. Go to a DECENT old fashioned hardware shop or most welding supplies places, and pick up a pot. Brush it on, leave it wash it off. It won't leave a polished finish, but it will get rid of rust/discolouration and leave them clean. Its then that you get a big dollop of elbow grease on them and get the shine.....if thats what you want. Won't stay bright for long though. They will discolour over time.