I started with an Etch primer from Precision paints, the green is from the Halfords enamel range which seems a good match for the Lister dark green so far as I can tell. Having said that most colour pictures I can find of Listers are post-preservation, so I don't really know the authentic colour! Details were picked out with enamels, and a well thinned wash of dirty brown applied and wiped off, to tone down the shiny green and give a careworn appearance. Some weathering powers, plus rust orange applied to panel edges with a cocktail stick, and coat of Testors Dullcote matt varnish complete the job.
I'm quite pleased with the result, which hopefully gives the impression of a working tool, without being over-distressed. The geezer at the controls has come out OK too. Just need to hide that screw, add some couplings, and re-attach a couple of details that have come loose when re-assembling. After scraping off some paint from between the chassis block and footplate to allow the electrons to reach the motor, it still works too!