When applying metal spray paint to a piece of furniture ensure the paint you are going to use is meant to be used on a metal surface. A gloss enamel with a built in sealer primer would be my preference as this type of paint is best to protect the surface from corrosion.
When applying the paint from a can make sure it is shaken vigorously for about a minute or two and spray a sample onto some paper to check if it comes out properly before commencing.
Before you begin using your metal spray paint ensure you cover everything that could be accidentally sprayed with an old sheet or curtain type material. Lastly, use masking tape to cover any hinges, knobs or other parts that require protection. Prepare the surface by sanding away any signs of rust or paint and fill in any uneven areas of the surface with polyester fill then sand down to make the surface smooth and even. You are now ready to use your metal spray paint. As a rule, to get an even spread across the surface to be sprayed you should stand at least a foot away from the furniture.
Spray in an even pattern until the surface is completely covered. It is important to keep spraying a fine mist and not to stop. A second coat can then be applied if considered necessary.
Any hard to get at parts of the furniture item should be done at the same time. When the job has been completed the metal spray paint should be allowed to dry completely before the masking tape is removed and parts of the furniture are reassembled.
