After sanding, painting, resanding, spackling, resanding, painting and sealing, here is what I came up with for single and double windows:

Pretty exciting, huh. But here are some pieces in place in the 2nd floor bedroom:

The purple paint tape left smudge marks on some pieces of wallpaper but not others... Hmmm... My plan is to put paneling up near the ceiling, so that should cover the smudges if I make it come down far enough... I will have to get in there and do some spackling touchup on window parts before I repaint as well...

I am very proud of my window handles! I installed them with little nails-- probably need to put a touch of superglue just to make sure they don't pop out...