Anodizing Engravings

A while back I asked a question about painting engraved letters in
anodized aluminum. Got a lot of feedback and performed a little test.

I engraved 2 small aluminum panels, and immediately after engraving
washed the panels with acetone to remove the cutting fluid. I then
applied alodine to the engraved area and rinsed with water.
A few days later I painted the engraved letters with some epoxy
paint and let it dry. Sanded off the excess on the unengraved part
and had them anodized. One was painted white, which was black
anodized, and the other painted black which was clear anodized

The black anodized panel with white lettering did not come out too
good. The black dye didn't seem to soak into the metal close to the
white paint, so there was a lot of small aluminum color blotches near
the lettering. I'm unsure why this is.

The clear anodized panel with the black lettering came out perfect.
Looks very professional. This is the way to go if you need to do
something like this. Just be sure to etch or alodine the metal first
so the paint has something to grab on to. I guess the epoxy paint
is impervious to whatever they use to etch the metal before anodizing.

I will probably build a control panel for EMC using a keyboard circuit
board and some switches using the clear anodized finish when I get time.

Is it possible to hook up 2 keyboards to a computer just by wiring them
in parallel, or does anyone have a circuit to do this? I really don't
want to
switch between the two.

Bill