The top chassis is painted with black wrinkle paint, which can be found in the paint section of your favorite automotive parts store. The trick to getting a nice "wrinkle" is to place it in the oven at about 170F for about 10 minutes, then take it out and let it cool slowly. I suggest you do this when the wife or girlfriend is out of the house for a few hours because it will definitely smell up the house. Then when she comes home and asks what that smell is, you can say that you had the front door open and the fumes must have drifted in.
The bottom chassis is painted with bronze Rust-Oleum Hammered. The end bells on the transformers were painted with Hammered Verde Green. (I guess the marketing genius at Rust-Oleum did not know that Verde is Spanish for "green", so in essence, they are painted "green green")
The chassis was previously a telecommunications piece of equipment of some sort. I bought the steel chassis at a local government surplus store for like $5 years ago.