Yes they need rubbing down first with a wire brush and a scotch pad to give the paint a key to adhere to.Paint them in Black. You don't see the inevitable brush strokes and they look better than silver when dirty! The Halfords high temperature paint is spot on too!
Well I first used the smooth silver Hammerite but I think it looks to silver against my monza so was thinking black and I am thinking of getting monza shadows eventually, which black would you recommend greeners???