Can the rust sealer fill in heavy pitting and pinholes?

Mastercoat Permanent Rust Sealer has been sold for many years under the title “Get Rid Of the Pits!”. Its high build characteristics and high solid content will usually take care of some major pitting, especially on hoods, roofs, and trunk lids. This is where you’ll really see the quality. You can apply multiple coats until those pits are filled in!