Usually with a die-cut house, if I’m using the windows that came with the kit I’ll apply wood filler to the inside edges of the window to smooth them out. I do this once the trim (either interior or exterior) is glued in and then carefully repaint, to give the edges plus trim a nice uniform surface. For the Victorianna’s bay windows it will be much easier to glue acetate to the outside of the window, so my plan was to add the interior trim and then use the wood filler to smooth out all the interior edges.
But because cutting out the window holes left some jagged edges on the wallpaper, I decided to cover the window edges with strip wood the same way I do with doors. This seemed like a better plan for a smooth finish, with less chance of getting wood filler and paint on the wallpaper.
I started by painting one long piece of 1/16″ thick stripwood my Tuscan Beige trim color. This cuts easily with scissors so I cut the pieces to fit each window, once the paint was dry. Here you can see the window on the right with trim installed, and the one on the left without.
With all three windows were trimmed out, I next added vertical trim at the sides of the arch. These are made from one piece of half scale door/window casing flush with the wall, butting up against piece of strip wood that covers the plywood edge. Once the glue dried I carefully painted over where the trim pieces meet, to get rid of visible seam.
(I had to use a larger piece to cover the plywood edge on the right side than on the left, to account for a gap where the walls don’t quite meet there. Because of the angle you can’t see this bay window head-on, so it doesn’t matter the trim’s inside edge is slightly larger on the right than on the left.)
With the vertical trim glued in, I measured and cut a header piece. I couldn’t come up with a graceful way to handle trim around the arch (and didn’t want to use what came with the kit) so instead I’m covering the arch to square off the opening.
I added crown molding around the top of the header. This is a different style than the crown molding I used in the room — I didn’t want the header to look like repurposed crown molding, but like a distinct element.