‘While polishing, I’m looking for scratches and imperfections, most of which can be buffed out using an abrasive hand pad which gives a nice brushed finish. The way I normally finish frames before they are painted is I’ll buff the whole frame using 240 grit [sandpaper] and then use this pad. However, this particular frame is going to be nickel plated, which is very thin and shiny and will show up all the tiniest marks, so I want to give it slightly more, using perhaps 800 grit and then 1200 grit’