Sand with fine grit and finally extra fine grit sandpaper.
Paint metal sliding door frame.
Lightly sand the door then wipe it down to remove any lingering.
Touch up any marks or scratched caused during installation.
Spray the surface of the aluminum door with self etching spray primer or primer formulated for clean metal.
Use a sanding block or an orbital sander to strip the steel.
Secure old wrapping paper to the border of each piece of glass with painter s tape.
Keep the can in motion spraying in slow.
Cover the floor with an old sheet.
Metal door frames are typically made out of steel and must be painted to protect them from weather related corrosion.
Hold the nozzle about 8 inches from the door.
Tape off the outside border of the door frame with more wrapping paper.
If possible paint the door frame before installation to reduce the amount of masking required to protect surrounding surfaces.
Remove the door if possible and cover any parts of the door you do not wish to paint.
Video of the day.
Thoroughly clean the door with a degreaser.
Mask off the glass part of the mirror door with paper then spray paint primer on the metal frame around the door then.