Some of the oldest figures I have had for the game (they came with the initial starter box) is the unit of Speederbikes. After all this time, I managed to finally give them a proper coat of paint, without covering the transparent post.
Paint method is very similar to my scout trooper process (Apothecary White, Black Templar, and a Flat White focused drybrush), with the addition of the bike itself. This is done entirely with contrast paints, a layer of Black Templar on the bottom and mechanical pieces, Gore-Grunta Fur on the armor panels, and Skeleton Bone for the bundle on the back.
The base is my routine Empire style, with Lava Orange undercoat and a Mordant Earth crack covering.