Hi Tammi, here is a link to a cart redo. It looks really nice and you could use other colors if these colors do not match what you have. I think it would be a nice look for a microwave cart.
Hello -I would suggest spray paint. The new formulations colors sheens and effects are something to consider.
I think spray paint would work well, too. Good luck!
I updated a simple Ikea cart by following these steps. >> https://www.homeroad.net/2014/10/ikea-cart-kitchen-island.html
I hope this helps!