In order to repair a wooden window, you need to remove its wings and remove all the glazing out of them. This is done quite easily you need to just carefully remove all the stacks, and then remove the glass and put it in the distance from the work. After that, it will be possible to start updating the frame. First you need to inspect and if you need to adjust all the connections and fasteners those present on the frame and after that you can start painting. But before direct painting, it is necessary to remove all the old paint, using special flush or any solid object, for example, a scrap or spatula.