The floor pan is such a large area i had to tackle it in three sections.
Rust removal floor pan.
Alternatively soak the pan overnight in a solution of water.
If you replace left and right side partial panels and leave the original tunnel intact you re welding about ten more feet of sheet metal versus replacing the whole floor.
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.
The front where the pedals are the middle under and behind the front seats then the section under the rear seats.
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.
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.
Curiously replacing the full floor pan is actually less work than doing two partial panels.
Patch panel rust repair full floor pan vs partial floor pan.
Take a sponge with a scrubber and scrub at all of the rust spots using the heavy duty scrubbing side.
The baking soda will help wick up and remove rust that is in the pan.