Question

how can brightness of metal be restored?

Answer 1

Metals lose their shiny nature when they react with other materials in the environment. The metals form tarnish or rust, which a compound of the metal and other elements such as oxygen or sulphur. This is the reason why, with time, metals lose their shiny nature.

To remove the tarnish or rust you can use the following methods to restore the shininess:

-Scouring with materials such as steel wool.

-Scrubbing with salt based scrub

-Scouring with flour based scrub

-Boiling in a solution of salt and vinegar.

Hope it helps!! If it does, please mark as brainliest.

Answer 2

metals loose their shiny due to rust upon them .scrowing metal with salt based scrub..
add zinc coating....etc