Here are some ways others found to paint them. You can look under "explore projects" then "paint" and type terra cotta in the search box and hit enter.
Acrylic pant then spray varnish works.
Making things from pplettz
Here's some more ideas created by other Hometalk members. Hopefully you'll find something that will inspire you! Wishing you the best.
Dorothy....I just clean mine then spray with paint or use a sponge brush or regular brush. I have used little bits of leftover paint...You can also tape around and stripe them or put peel and stick stars, dots, etc. on and paint over then peel off.