Sand the entire door with 400 grit sandpaper.
Sanding metal garage door.
When painting metal it is really important that any loose paint is really well rubbed down and if in the process you get back to bare metal then this metal must be primed.
Choosing a paint color may be the most difficult aspect of the entire process and there are a few things to keep in mind.
Apply a metal primer before applying your garage door paint.
If you are painting over a previously painted garage door then a light sanding is required along with the same degreasing process.
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If the door has not been previously primed then apply at least one coat of metal primer to the entire metal door and frame.
If you are over coating a previously painted garage door then a light sanding is required along with the same degreasing process.
Allow the door to air dry thoroughly before you proceed.
Applying a good paint thinner or stripper and scrubbing it with a metal wire brush should do the trick.
T he first thing you will need to do is remove any paint from your metal garage doors.
Once all the paint is removed you will need to clean the door and let it dry.
When sanding metal to remove rust or to deburr an edge therefore you shouldn t use sandpaper with a grit coarser than 220 and if possible you should use an even finer one such as 320.
Spray the metal garage door with water from a garden hose again to wash away the detergent and any residue.
Sand the entire door not just the oxidized areas to help the primer stick to the door.
Painting a metal garage door involves some time and effort but in the end it s a great way to give your home a fresh new look.
Use fine grit sandpaper around 400 over the entire surface of the door.
Then sand the door so that the newly applied paint will stick to the metal surface.
Roughen the surface of the metal garage door with a hand sander and medium grit sandpaper.
Prepping the garage door ensures that paint will go on easily and hold up well.
It s important that any flaking paint is well rubbed down and if you get back to bare metal then the metal must be primed.
If the doors were previously painted you may want to choose a color that s.
To allow the primer and paint to adhere to the surface of the door you should sand it down lightly first.
Degrease the door with sugar soap then allow to dry.
Use a medium to heavy grade sandpaper to sand the entire door.