I'm refurbishing an old Kenwood amplifier--- removing the old faceplate and adding a board with a microcontroller, multiplexer IC, digital pot for volume control, IR receiver, etc.
I'm also considering adding a small display of some kind, either a seven-seg, or graphical. I know there are various ways of cutting a square hole in metal or plastic, but it seems like most of the displays (example) expect to be mounted behind a cleanly-cut hole, unlike most switches and buttons and other penetrators, which are inserted from the outside and have an overlapping flange that covers any problems with the hole.
So my question is, how could one make such a flange for an arbitrary LCD? Can they be bought? Are there hobby-ready LCDs out there which include it?
What about alternatives, such as mounting dark-tinted plexiglass over the entire front-face of the device? Can anyone comment on their experience with such an approach?