While this isn't exactly a rack, it does share history with me cleaning up my first metal rack.
This is a 1930 era art deco casting, that came with many flaws. I could have filled the flaws except there's a pretty good chance that is lead based paint, so I wasn't about to sand it, grind it, or
disturb the paint in any way. This is it at one coat of primer and two coats of hammered. You can see that severe bit of rash on the upper surface has begun to fill in. Another coat, maybe 2,
and I expect the flaws will have disappeared entirely.
My past success with refinishing a rack and some commercial theater seats years ago, is being revived, as a featured finish for the next home theater. Since I have flipped a few racks over the
years, I also have a motley collection of face plates, that were set aside. I expect to try to salvage some of them and see if a wood "sandwich" and a simple wood frame can establish a perfect
face plate opening. A router and bearing guide would then be used, to create the new opening. Then rattle can hammered paint gets put to work. One rather nice plus of flipping a few racks
over the years, and retiring some upgraded gear to the credenza, is the credenza is all anodized plates.
My preowned Slim5 for the theater has already been cut down in height, and if I can salvage a few face plates, with new openings, my motley collection of mixed face plate finishes, with
see a unifying coat of hammered paint. The Slim5 while in near mint shape, might also see it's front rails and exposed edges of the top and bottom sprayed out.