The windows in my old house (150-200 yrs) have wooden frames. During
cold periods, condensation gathers on the window pane then runs down to the
frame. The water creates a good spot for mold to grow, wrecks the bedding
putty, and lifts the paint. I don't know if the frames were originally
primed but doubt it.
My instinct is to scrape away the flaked and checked paint, use TSP to
clean and kill any mold, oil base primer, replace putty, oil base primer
again, and then apply a latex finish coat.
If there is something I am missing here, I would appreciate any