Leaderboard

As Mike says above. They are zinc plated steel (probably with some sort of passivation). If you go at them with any sort of abrasive you'll be removing the protection and then they will definitely rust. I'm with the other comments, clean them with a suitable solvent, WD40 or similar is good for this type of cleaning, then protect with a grease or wax type product (Waxoyl or the mentioned ACF50 grease or similar). They only really need particular attention during the winter when salt is around, the rest of the year an occasional wipe with ACF50 will do the job. The plating is not pa