How to do this

[spizzoil]

 :imrgreen  have  to say that's one great job I would of thought they were past the sell by date but goes to show what can be done

[lawrie]

Well its turned out to be something I cant do as good as you guys, 
After a week of grinding/buffing & polishing, this is only as good as I could get, & I threw-in the towel, don't look too bad from 1/2 mile away, but not any closer, went round the block a few times, cough cough, splutter, NOW WHAT??

Its amazing what a can of fuel does, runs lovely now!

Anyroadup, just as I suspected, they've already turned 'brown' but surprisingly, I think in this case they look better, sort of matches the corrosion.