I sanded the tin and painted on black gesso, inside and out. I was really pleased when I discovered black gesso in a store in Rendsburg, but it transpired that the brand (Bob Ross) is too runny for my purposes. It's probably wonderful for priming canvas, which is what the manufacturer had in mind, of course, but too thin for creating textures. Luckily I was in Hamburg at the end of November and picked up a super special offer on some Lascaux, my absolute favorite gesso.
I collaged pictures, papers, and found objects into the tine and painted the left side over with a wash of fine glitter paint. As a final touch, I added a slim accordion journal.