Some while ago I bought white and red flower pots at IKEA. The red ones were severely reduced in prize (I think it was 70%), that's why I took them with me. I planned to paint them black since the red fit nowhere into my flat. So I gathered my supplies (black spray paint, rubber gloves, and a old pizza box) and got to work!
It took me three coats to get the colour right and another coat of clear spray paint for longer durability. And the final result looks like this: