Then make sure you properly seal the floor pans.
Rust removal floor pan.
Take a sponge with a scrubber and scrub at all of the rust spots using the heavy duty scrubbing side.
If it s just surface rust the most effective removal process is simply using a grinder with a wire wheel to clean up the old sheetmetal.
The floor pan is such a large area i had to tackle it in three sections.
Curiously replacing the full floor pan is actually less work than doing two partial panels.
The front where the pedals are the middle under and behind the front seats then the section under the rear seats.
If you want to remove rust from pots and pans use a gentle abrasive like salt that will scrape up the rust without damaging the metal.
Patch panel rust repair full floor pan vs partial floor pan.
To remove the old grease and waxoyl i have used bits of the old carpet and cut into rectangles sort of five by seven inches or so.
To scrape off the rust cover the bottom of the pan with a thin layer of salt and scrub it in using a brown paper bag until the rust is lifted off.
The baking soda will help wick up and remove rust that is in the pan.