I am having a difficult time trying to open many of the leaded glass casement windows on my 1930 Tudor. Some of the windows opened easily, others took some elbow grease and the few that remain refuse to open. There is no crank with the windows; rather they have a brass handle at the bottom of the window that has a small key on the top of the handle which tightens the handle down to lock it in place.
I am searching for ideas on how to pry the rest of the windows open. I've tried to use a utility knife to cut the paint and have also used WD-40 to lube the joints to try and work them open. This was successful for some of the windows but not the more difficult ones. New windows were going to run me about 40K and I'd much rather not spend that and keep the original windows as they provide much of the home's character. Any suggestions would be greatly appreciated.