Filling small holes in metal enclosure

[xorophone]

If you have one hole, fill it with a photoresistive sensor and wire it in series with the LED.  When there is a lot of light, the resistance goes down and the LED gets brighter.  When it is dark, the resistance goes up and the LED gets darker.  You may need series and parallel trimming and padding resistors to get the right range.

If the hole is near a control (like the anti-rotation tab on a pot), use a skirted knob to hide the hole.

Wow, that's a great idea! I might actually go and "accidentally" drill some holes now. I really love that idea. Haven't thought about it before, but it's really smart and such a simple thing to do.

Thank you!