Break sashes loose so they can be worked without trouble. Scrape off all loose paint and putty, then sandpaper. If the putty is soft or broken away, it is best to remove all and not attempt to patch up broken places. Apply a heavy coat of paint in the groove where the putty has been removed. The same paint used for trimming or body color is often used for this coat, but should usually be of a heavier consistency and requires a different mix, however, where blacks or reds are used, it is a good idea to have a groundwork of dark lead color for black and terra cotta for reds. If the sash is in good condition, not badly weather-beaten, the paint should be mixed half flat and a finishing coat of black or red varnish color applied. Before applying this finishing coat, reputty the sash where necessary. If the putty is to be painted, it is best to reputty some days before tracing, so it will become set.