Picked up this Christmas Advent Calendar from a second hand store. I wanted one of those mirrored ones from Target but just couldn't justify the $50 price tag. This one was $2 and I used leftover paint from other projects to update it. First I spray painted it silver, then went back with white and metallic acrylic. Swirled the paint on to give it a bit of texture and interest. Then cut out numbers on the Silhouette SD vinyl cutter. For $2 it'll get the job done and the kids will love opening the door each day to a surprise.
Might go over it with some clear gloss spray paint for a layer of protection.