Before I went to all the trouble, I would seriously consider having it chemically treated with something to remove the galvy first. Then if it were mine, I'd have it powder coated, not painted. Paint will build up at the holes and you'll likely have reduced air flow. JMHO.
A black and red scheme would look good IMO. The newer 2388s with the fluid powered screen are all black and they look good. But a red outside band would set things off especially from an angle.
Oh right, they're silver on a 2188 aren't they? My memories were thrown off by the black replacement screen on our old 1680. Only thing I can think of is the new Gleaner silver (probably too bright) or OEM black. Personally, I think the black looks nice.
On our 2388 the paint was coming off the back of the screen so I just grabbed a can of black from our dealer. It's about a 10ft paint job; not perfect but much better than patches of silver spinning around. The screen itself has some rust on it, but my overactive imagination had the holes in the screen filling with paint and reducing airflow (probably not an issue seeing how it was already painted once).