OK, I've now read up the various Black Widow UK threads and am just about up to date (phew!). However there's one question I have that hasn't been answered so far as I can see. Dulux would have us believe that their lumitec paint reflects more light and it looks as if the chap who set us on the road to BWUK was trying to mix this with Auto Air Aluminium to make a grey which is very reflective, improving blacks whilst preserving whites. This was discovered to have a blue bias, so the lumitec was swapped out for another paint with a specific tint calculated to offset this bias, presumably (if dulux are correct) at a loss of reflectivity? Now AAA has lost it's tint, but rather than dropping back to lumitec the current BWUK uses a grey paint like dulux grey steel. My question is this - would lumitec mixed with however much AAA you need to get the grey you want produce a higher reflectivity than an AAA and Grey Steel mix? Thus getting the blacks and colours we want without effectively sacrificing lumens? Is it simply the case that AAA can't get a white paint grey enough, or is there no advantage to the lumitec in reality? Or, is there an upper limit to the AAA that can be added without some negative effect (hot spots, sparkles)? If that is the case, would mixing a Steel Grey 2/3 shade from lumitec absolute white and a neutral black offer any advantage by preserving the lumitec base?