Putty A Leaded Window Tutorial - Free Patterns for Stained ...
The next step, when you putty a leaded window, is to brush it with a plastic bristle brush. Brush towards the edge of the lead, not up and down the lead, to help pack the putty under it. Brushing will also begin to clean the putty off the glass. You can see the wet putty on the brush bristles in the picture.