The vaporators and crates were primed in grey then given a heavy dry brush of VMC Stone Grey followed by a wash of GW Agrax. When completely dry, highlight with VMC Stone Grey then pick out the edges using any light, pale grey such as Foundry Austrian White shade. A few dabs of GW Typhus Corrosion completes the weather worn look.
The terminals and the larger crate were even easier! Black spray followed by the Foundry Charcoal palette. The buttons are simply dots of very light grey followed by red, green, yellow, etc.
In games these items can be used as objective markers (there are several mission cards that require such features) or just as suitably atmospheric scenery.