Still having a go at these, trying out some new ideas. The short version is that having the right tools and materials is still key, but I've got a way to go with some other stuff.
I think this one looks better in person than as a picture. A couple of shades of blue here with a blue wash and drybrushed metallic blue on some components. Oh, and purple spikes. I didn't even try to figure out something clever to do with the windshield.
I'm finding that it's hard to make yellow work, but this one wasn't too bad. I initially tried masking the area for the blue stripe with tape, but it pulled off the paint instead. Had to do a swipe with a broad brush, which isn't great but worked better than I expected.
Another one that looks better in person than on film. Tried to do a few different shades of green, which wasn't entirely successful.
Probably my best out of this batch. I credit the red wash, which ended up being kind of glossy and goes well with the copper accents.
Most of the cars I've done have used the same four colors used by the Car Wars bases (blue, green, red, yellow; clever, no?), but I thought I'd depart from that for a few other cars. This one uses a sponge stippling effect I use all the time for painting stone terrain pieces. Dip the end of a bit of sponge in some paint, stab at the piece with it, and and lather-rinse-repeat for several passes each of at least three or four gray or earth-tone shades. I finished with some dry-brushed green for a mossy look.