This looks promising:
Laser Engraved, Wax Filled, High Contrast Panels for Electronics Projects
Posted on February 16th, 2011 by James
This technique for creating high contrast panels for electronics projects and prototypes using a laser cutter gives great results using cheap and easy to find materials. It’s really useful as an alternative or substitute for more expensive and harder to find laser engravable laminates like SureLase.
The product we use at work for laser engraved signs on products we ship, SureLase, gives great results, is super easy to use and available in a large range of colours. Its downside for non-commercial users is its price and the fact that you have to buy a large 1 x 1.5m sheet. It’s also not as versatile as a plain piece of 3mm acrylic, you can’t make other parts out of it since that’d be a waste.
Here are some photos of some items made with a different method, achieving similar results and using just 3mm white acrylic and a black wax crayon. It’s easy, fast (though not as fast as SureLase) and looks dead smart.
Example electronics project facia, missing the pot and switch to finish it off:
Will need to give it a trial on an upcoming build!