Feeling hesitant after last weekend’s rail-ripping episode, we approached the remaining crazy-painted-in upper sash. This time we both labored—on the inside and outside of the house—to free the sash. First there was lots of paint poking and scraping, storm window removal, caulk removal. After at least an hour of this, we had the sash potentially able to move but felt cautious about yanking on it. So the tool-using monkey tried grabbing the meeting rail at the side where it attaches to the stile with a wood clamp. The clamp was too big, but then he took the pads off it and used them with a C clamp. This let us grab the rail while holding the rail and stile together. Then the sash slid down for the first time in decades.
Finally it was time to remove the parting bead, which should have been easy with the top sash down. It was—surprise—not so. The parting bead was nailed in, so we banged the brad down through the bead using another nail and a nail set. But there was more than that holding the bead on—aged shellac, which had petrified into a fossilized goo. We applied denatured alcohol to the bead and the area around it; this helped a little. And then that clever tool-using monkey struck again.
Now I just have avoid breaking the glass when I remove the glazing. This sash is one of the few that has the original, purtypurty wavey glass.