Painted for Games Day Canada 2002, so it had to be stock. And it's RED, not orange like it kinda looks in the pic. Red is notoriously hard to photograph especially when you just snap quick pics.
i like the conversion, but maybe a bit of shading? the red looks terribly flat, the metal areas would benefit greatly if treated with a few metallic tones (sort of black-black&boltgun-boltgun-chainmail-mithril) and some rust, also scratches are not necessarily in the right places (not where the rhino or some careless ork would scrath it). and the tracks look too plastic - same as above with metallics, and add some dirt - even sand or dust changes appearance of covered surface, the rhino don't need to go through mud to be dirty, and even if it made only a hundred metres from mekboy's garage to parking place, i don't think that orks keep their workplaces clean... otherwise, great tabletop-standard addition to any ork army that can make it even more orky though not truly of orky manufacturing...