I spent much of last week working on a sunroom that needed some repair. After fixing the cedar siding (read this post), I went to work on the windows.
The wood casement windows mainly just needed to be scraped and painted, however there were a couple small trim pieces that had rotted and come loose.
I would have to make the replacement pieces using my tablesaw to rip a small board down to a 3/8″ x 1/2″ moulding that would replace the one around the window. 
After replacing the trim, I caulked the gaps which were mainly around the sill at the bottom.
Then, I scraped all the loose paint off, trying to catch as many of the paint chips on a drop cloth below and gave the windows a coat of paint.
This homeowner was wise to attend to these windows now before they deteriorated more. 
If they had waited much longer, it’s likely that more the wood would have been damaged and needing to be replaced. Now their sunroom is all spruced up and ready to go!
-Peter
