The cast aluminium garden furniture does need tarting up, I had to concede this to Mrs R. I have power washed the old paint off and will wire brush it before painting, but I remember from working on aircraft that you need special primer to make the top coat stick, this seems to be zinc chromate which is poisionous. I can get Hammerite "Garage Door" which self etches onto Al, just wondered if anyone here had used it and is it any good? Or does anyone have a better way to paint Al, the set is table and 6 chairs all in frilly pierced shapes. I have got a spray gun and compressor.