I used 800 sand paper finished it to 2000 grit. primed and spray it chrome using halfords spray paint then sealed it with tiger seal. 2hrs process from opening to sealing. its not hard as you think as seals comes off really quick with some heat.Thanks for the replies. I think I'll have a go at restoring them.
@GenZed how did you clean the old chrome/reflective to paint it with chrome paint? What did you use to reseal the lamps?
Many thanks,
Dan