Soak the cloth in white vinegar and wipe all rusted areas.
How to fix rust on bottom of garage door.
Rinse and allow to dry.
Dip an old cloth in white vinegar do not use cider or spiced vinegar and wipe the rusted areas with a steel wool pad.
How to fix a rusting bottom panel on a garage door.
The vinegar reacts with the rust and dissolves it.
Brush the door with soap and water starting at the bottom where the rust is concentrated.
In this video i focus on door bottom rust repair and will be showing you how to remove and replace a lower door skin on a car or truck.
Clean the bottom panel of the garage door with warm water and a grease fighting dish washing liquid.
Scrub the rust off with a steel wool pad.
Close the garage door.
Rinse thoroughly and let dry.
First clean the entire door with the water and dishwashing liquid.
An alternate product might be corroseal which is a rust converter and latex primer in one which can then be topcoated with a latex paint.
Dip a cloth into white vinegar and wipe the rusty area.