1969 Race Dart w/ 426 Hemi- garaged for 45+ years

A buddy loves a product called Rust Bullet. They have automotive and industrial coatings. Likely what I will use on the Charger
I use corroseal or phosphoric acid then cover with rustoleum... comes out good enough for my beater :) Being in michigan i have rust issues and am trying to remove every bit i can find.. which is a lot sadly