Do you mean with a decorative design? Or what is your purpose for plastering?
Here is a site that will help you out.
Good luck with your project!
Here is a really good article that tells you how to do it: https://www.bidvine.com/a/can-you-plaster-over-paint
Yes you can as long as there is no peeling paint on the surface. If the paint is peeling you will need to remove all the loose paint first.