Indoor work can be bear steel. For indoor or thicker steel, I can give the steel a color ranging from green, yellow, purple, silver, and blue. Then I’ll reheat and add bees wax and Linseed oil mixture to give it a matte finish and protect it. Outdoor work can have Powder Coat, oil-based paint, or nickel/copper plating. If steel is thick, it can remain bear. When painting indoor or outdoor work, I like to use Rust-oleum oil-based paint. I mix my own colors using this product.