These are sold in China. I have posted another plan in this album for a different style that is a knock off of this companies products. Should be pretty easy to figure out. Im thinking leaving it natural (no paint) would be best for the cats.
My cats would love this! Pet Accessories -- Outdoor Cat Enclosure -- This is the ultimate in an outside cat run complete with pond, waterfall, tunnel and fountain. Absolute luxury living for the cats with fish to watch and tunnels to explore.