My first, most obvious decision was to spray the bases black - very simple!
Now this is all very well, but lacks something - they don't draw the eye in the way I find the reflective clear bases do, but they're pretty boring. So, something more is needed, and a basic star-field effect was a good start. This was also incredibly simple - take a little white paint, add a small amount of water (depending on the thickness of the paint - mine was old GW stock and minus a little of the original solvent. If you had new paint it'll need very little, if any). What you're looking to get is a consistency that will "flick" off a brush, but isn't so thin it'll form streaks, but discrete spots.
Now the next bit is messy! Put plenty of newspaper around or do it in a high sided box (as I did above), unless you want berating by your partner/parents/landlord! I used an old toothbrush (never throw them away - they have a myriad of hobby-related uses!), dip into the paint, then hold at about 45 degrees with the bristles pointing towards the base at a distance of about 6-12" (15-30cm). Run your finger back along the brush and it will flick little drops of paint on the bases. Practice on a piece of black card or something beforehand, and you'll find you can vary the density, size and pattern of these pretty easily. It takes seconds and creates a pretty convincing effect;
So that was my bases covered. Next was something that (like many inventions) came out of an error. I'd ordered some 1-6 dial counters from Litco which I intended to make SRS counters with, but in fact I'd made a mistake and ordered 1-10 dials.
So what to do with these? I had an idea - I could use them for hull point damage on capital ships. Unfortunately I found that the pointer moved at the slightest nudge of the base, which made it pretty unsuitable, so I needed a way of preventing this. First, I found some steel washers the same size at the local hardware chain, and sprayed one side red oxide primer;
Next I carefully drilled out the back of the pointer and inserted a 3mm Neo magnet;
The next steps are just assembly - the washers fit over the peg of a standard base, the dial goes over that....
...and then the pointer with magnet goes on top - the magnet stopping the dial/pointer rotating around every time you move or knock the model, whilst still being able to turn and indicate Hull Points;
So we now use these on our Capital class models to record HP, reducing the number of tokens we have to have on ships - meaning they can be used for more important things - like critical effects.