If the linoleum is stuck down, you may want to take some aquarium silicone and seal all of the edges to keep urates from seeping underneath. Might want to do a linoleum "splash guard" as well. Just go about 3 to 4 inches up each of the wooden walls with linoleum and that will catch most of the fecal matter that tends to get smeared. Really helps when it comes cleaning time. Looks good though. Did you build the box or convert an old chest or something?