Give it a good cleaning so there isn’t any dust or gunk on it to keep the paint from sticking. Rust-O-leum spray enamel paint works really well and holds up. Even though it’s a bed and will be inside, paint for outside use is extra durable to be weather resistant.

Spray paint gives you a smoother overall coat, but you will find that it won’t get EVERYWHERE, so you may have to get the tiny crevises with a brush. You get a cleaner result if you do the brush work first, then spray.