The Choosing   Men in overalls on ladders balance brushes and tins, wear sunnies to cut roof glare once we choose what goes where   but paint charts cover the table, sample strips and squares, with names that label every hue. Our decision’s overdue.   Black’s no longer eponymous. It’s Trendy and Klavier, Leadman, Ace of Spades, Rhino Hide and other shades.   Heavy Metal works for gates and railings at the steps but what does black, at length, become when half or quarter strength?   The federation finials, curlicues and spindles need colours in the end that contrast or…