I'm planning on building a Warhammer 40,000 Necron army. Earlier this year I bought a box of Necron warriors, but due to real life interrupting, have only just finished the first test model. Here it is:

Click to embiggen. I designed the painting process to optimise for speed: once prepped, the model was sprayed with silver spray paint bought from my local Hobbycraft store. The next stage was to give it a thorough wash with the Citadel Devlan Mud wash, however the finish of the silver spray meant that the wash didn't adhere, so it was given a coat of Purity Seal to give the wash something to stick to. A couple of washes were added, and the base painted with Snakebite Leather. Total time involved: about fifteen minutes!