Dryrot removal. We ended up having to remove the entire windowsill. We replaced it, primer and painted it. Same went for the bedroom window and the diningroom window.
We're waiting for a new sash to be built to replace the rotted one. I've already prime and painted all of the parts in anticipation of it's arrival.
I've also began to scrape all the old paint off the sills and prime & painted those as well.