My husband found 3 old windows, with the original panes still in place, in the woods one day. I wan't to try to do some stained glass projects with these and hang them up inside my house in front of my windows in my sunroom. My question is, how should I go about resetting the panes, since they are not in the best shape, and still keep it looking like an old window. What should I use, putty? I have no clue. Also, should I paint the glass for my stained glass project while they are out of the window frame, or wait until I reset the panes? Like I said this is a first for me.Please Help!