How do I remove rusted metal caps to add air to my tire?

Use this stuff called Rust Remover. There are a lot of Rust Remover To Remove Rust With No Scrubbing Or Wiping. Spray it on then let it set for a bit the use a pair of plyers or if the caps are hex heads use a wrench. Its best to first try tightening a litlle then then then braking it loose. after.

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