Here are my gauges.
@Michael McKelvey from the lighting I can't tell if the bezels for yours are entirely black, or if the inner edge are metallic while the outside is black? For mine, the black was bothering me and I wanted chrome bezels. Even though VDO and others sell chrome bezels, I couldn't easily find them for the two 914 bezel sizes, and messing with that bezel ring is cumbersome. So I hit them with a bench grinder in an inconspicuous spot and was surprised to find beautiful brushed metal underneath. Therefore, I buffed them all. I can't tell but they *might* be stainless steel, and if so, I'm not sure of the grade. So I clear coated them, which took away from the brilliance, but at least I sleep better at night knowing that rust is less likely to say hello. Not chrome alas but I'm still really happy with it, I'd do it again. It was a long/tedious/diligent process (at least the way I did it), so I'm happy to elaborate if you think you might try yourself.