Get the 1590XX guitar pedal enclosure in White Powder Coat.
Great for guitar pedals, instrument builds, and all kinds of audio and other projects. (We're looking at you, ham radio enthusiasts!) This die-cast aluminum enclosure box comes shrinkwrapped with 4 screws.
The white powder coat finish is solid, not a perfect 10. They are good enough for 99% of most applications. The finish is tough and way better than what you can achieve with a spray can. Speaking of spray cans, these things take paint like a champ. You can easily apply one decent coat of a cool color and decorate to your hearts delight. You'll have a great looking design that is going to save you time and money on doing the whole process of sanding, bathing in acetone, priming, sanding, etc.
The Internet isn't in complete agreement on what the official size is for the Hammond replacement series 1790NS/1590XX, so you should check my measurements just to make sure we're talkin' 'bout the same thing.
1590 Hammond series replacement
With back plate and four screws
Length: 145mm (5.7")
Width: 121mm (4.7")
Depth: 40mm (1.5") including back plate