Refinishing outdoor furniture: powder-coating
A technique for finishing metal objects.
What is powder-coating? A technique for finishing metal objects.

Why powder-coat? Often used to revamp old car components, it is also a terrific way to give beat-up furniture a brilliant new look. A powder-coated surface is durable, requires little upkeep and is less likely to rust outdoors.

How is it done? A powder-and-resin mix is electrically charged and sprayed onto stripped metal, which is then heated in an oven for a smooth finish. Most shops offer a spectrum of colors, and finishes ranging from flat to high-gloss.
What can I have coated? Garden furniture, bed frames, lamp bases.
How do I find a pro? Check out for a list of shops by state. Some shops take only industrial orders, so call ahead.
Is it expensive? Having a garden chair powder-coated costs $40 to $85 (more prep work, like stripping, puts you at the higher end of the range). 
from around the web