black touchup paint?

Isn't the black finish on most black audio equipment anodized, thus hard to match with paint? The shade varies by manufacturer, no doubt. Experimenting, I tried a Marks-a-Lot, too shiny (and tending toward purple, really). Wouldn't mind trying a spray, but small touch-ups are really the thrust of this question. Has anyone found a good solution? A dedicated "touch up marker" for audio gear would be mighty nice, if it were possible. Nothing would look exactly like new, but an improvement over a glaring scratch on the handle of my amp would be welcome.