Proto Pedal Chassis Hookup Guide
Byron J., 
MTaylor 
Painting
For a finishing touch, you can paint your pedal. We've chosen to try out a couple Rust-Oleum oil-based enamels, which have wildly different properties based on the color, and a spray job using red Krylon Shimmer spray paint, with a clear overcoat.
Start by cleaning the case with acetone or isopropyl alcohol. This removes oils and pencil marks.
The liquid paint was applied using a foam applicator wedge.
Painting can be a messy process, and you're likely to get some on your work surface. You can protect against paint slop with a drop cloth, or other scrap materials, such as wood, or cardboard.
You can paint the faces of the screws too, if you wish, but try not to get any into the threaded holes, or they may be difficult to drive.
Painting Results
You can see that the red paint tended to pile up and stay streaky, and needs to be sanded and coated again. This paint should probably be used with a sprayer or thinned out. The black leveled well and could be sanded to a decent finish, but the red refused to level as can be seen above. The Shimmer paint was pretty much fabulous.