Polishing brushes are softer and ideal for cementing and polishing, but you will need one for each job. Use this brush for applying a coat of black grate polish to your stained glass window , mirror or panel.
Apply a small amount of polish to the brush, then work vigorously over the lead (taking care to avoid pressing down - which may crack the glass). Work until you have cleaned the polish from the glass and the lead is as black as you desire. It is essential to let the polish dry onto the lead otherwise it will rub off. You can also deepen the black colour of your solder joints on a stained glass panel by applying a small amount of black patina.