Anderton outlines several in his book. My preference is to paint it with a good primer, bake it in my oven at 200 degrees for an hour, cool, and paint with an auto touch up paint, then bake again. When this is cool, the paint should be reasonably durable. This is perfect for baking paint on small objects - like effects boxes. You don't need the oven for lacquer finishes, but for enamels, it is great.
Baked enamels flatten out to a high gloss and get really hard and durable.
If you used a light color paint, you can use your laser printer or copier to print labels on clear laser-printer labels from an office supplies store, and letter the controls easily and neatly. If you use a dark color, the direct transfer lettering from electronics shops will work, but this will need another coat of clear spray to be durable. You print on it, then iron it onto copper clad. You can also print on it, spray the sheet with clear lacquer, and then water release the lacquer film, which holds the black toner. The black printing is good for light colored boxes, though.