The first step is to determine what the underlying metal is; then set up an electrical reaction.
How to Clean Brass Naturally
Rust-Proof Material - The salt and pepper shaker set has food safe material, not toxic, anti corrosion and rust-proof.Keep salt and pepper clean.
Salt and Pepper Shakers - Glass Salt Shakers for Kitchen Sets of 4 - Large Sugar and Salt Shakers with Lid, Spice Shaker (5.7 oz & 4.7 oz)
Corroded saltshaker tops? You can restore the original look. - The Washington Post
HMF replacement tops/lids/caps for these vintage salt and pepper shakers? : r/HelpMeFind
Metro Plating and Polishing
Kenan Orhan: The Renovation, a Short Story - The Atlantic
KITCHENWARE NEWS - Oser Communications Group
For a damaged wood front door, paint might be the only solution - The Washington Post
Rust-Proof Material - The salt and pepper shaker set has food safe material, not toxic, anti corrosion and rust-proof.Keep salt and pepper clean.
Salt and Pepper Shakers - Glass Salt Shakers for Kitchen Sets of 4 - Large Sugar and Salt Shakers with Lid, Spice Shaker (5.7 oz & 4.7 oz)
Lynne Olson medium Lynne Sutherland Olson's Paranormal Blog