Coating your surface rusted floor pans with POR-15 is a great idea for your 1976-1982 C3 Corvette as they came with metal floor pans. First step is to scrape away all the old surface rust with a wire brush. After the dust/rust particles have been vacuumed up, thoroughly clean the surface with POR-15’s Cleaner/Degreaser. Next comes the Metal Prep (also from POR-15), then you’re ready to apply the Rust Preventative Coating.
Tip: When using these highly toxic materials, always use protective gloves and a respirator.
Tip: Use the cheapest paint brush you can find to apply the POR-15 Rust Preventative Coating, as it will be destroyed after one use. One coat of POR-15 is all it takes to stop those old surface rusted areas in their tracks. Once your floor pans are treated, they’re ready for insulation and carpet. NOTE: 1976-1982 C3 Corvettes had metal floor pans. HOWEVER, POR-15 works great on ANY metal surface.
Worked great on my C3!