We painted our kitchen cabinets on the lower part of the kitchen over the weekend. The laminate on the bottom cabinets was peeling off and gross, and we had been thinking of getting all new cabinets. I did rustoleum in our kids' bathroom about 5-6 months ago, and it's held up great. I had two free days, so we decided to do the lowers in espresso and leave the uppers white. After painting the island, we decided it would be too dark to paint all the cabinets espresso, so we bought the pure white for the lower cabinets. The melamine peeled right off the fronts in about 10-15 minutes. We didn't remove the melamine from the back of the doors because it was firmly attached and not peeling. Here's our after photo. Even though the directions said sanding wasn't required, I did some sanding because of the rough MDF cabinet fronts between the first and second coats. The white cabinets took 3 coats on the MDF and 2 coats over the melamine. The expresso only took 2 coats.
I didn't paint the white melamine (because I'm lazy) and we didn't even take off the doors....I used a detail paintbrush to paint around the hardware. (Taking off the doors in the bathroom had proved to be a nightmare getting them back on.) Looking closely, you can tell a slight difference between the uppers and the lowers, but only if you know what you are looking for. I can have people over again without being embarrassed by my peeling MDF cabinets, and hopefully it buys us about 3-4 years before we do a full kitchen reno to sell our house and FIRE! Total cost $125....Plus I have a TON of leftover rustoleum I might be able to sell on Craigslist or in my neighborhood.
Will edit to add pics.