WD-40® Brand on X: "Use WD-40 Specialist® Rust Remover Soak to quickly dissolve rust from tools, metal, cast iron, and more with a formula that does not use acids or caustic chemicals.
GUNK Rust Remover » GUNK®
Amazon.com: WD-40 Specialist Rust Remover Soak, One Gallon : Automotive
Know-How Notes: How to Treat Rust With WD-40 Rust Remover Soak » NAPA Blog