Unfortunately, You will not be able to remove the rust from a mask unless you use a chemical product, and it is recommended that you don't use chemicals on a face mask as you will then inhale the chemicals while wearing it. The best option is to buy a newface mask, try to stay away from the 2006-2008 Nike/Bauer face masks as they were prone for rusting. Once you get a new mask, air it out after each game and use a towel to dry it to prevent rusting.
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Easiest fix is to replace the bearings. Unbolt the wheels, pull them off the axle. Poke something through the axle hole at an angle to push the bearings out. Bring some to the store to get the right kind when you buy replacements. Keep track of the spacer that has to go between the bearings.
If it's a chrome surface, use WD40 and a wire brush or steel wool. If it's a painted surface, use phosphoric acid on it. You can buy the acid at a home improvement store under the brand "Osphos".
you can use a metal polish. you can use a paste automobile wax but never spray wd-40 on them
You remove rust from bikes by applying diesel oil or wd-40 and scrubbing with a brissle pad or steel wool