Powder coating is a surface treatment used to protect metals and other materials against potentially harmful environmental factors. This coating is applied electrostatically as a free-flowing powder and cured under heat or UV light. It can be applied to any material, but it is commonly used on steel, aluminum, and plastic. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.