make sure the paint is done outgassing and your fine, water based products are the least toxic
heat will make the paint outgas more (or any material that outgasses) since your going to be introducing it to a heated enclosure, I would suggest letting it outgas inside the enclosure at a higher temperature than normal heat that cage up to 120 or something and let it do its thing, once you can't smell anything coming off the paint anymore, then you can turn the temps back down to normal, sterilize and be good to go.