Time to start things moving on the workbench again.
I've had a couple of Shapeways 3D prints for a long time now. The had a clean a while ago (several trips through the soncator at work in beakers of Pyroneg (a lab glassware detergent) which seems to have removed the oily support (I can't smell it anyway).
I then primed with Tamiya spray paints . Hull Red for the DF
And a Grey for the Bedford bus.
This has odd unsmoothed areas above the wheel wells which will be challenging to get rid of.