There are many different types of laminated surfaces, and many can’t be sanded. However, using an orbital sander and 120 grit sandpaper may allow you to add more gripping tooth to the surface. Test in a very inconspicuous area if you wish. Most of the harder plastics won’t sand very well if at all. Don’t push it if it isn’t working.
Prime with a quality primer. If you need additional coverage, use two coats. Allow to dry 24 hours.
Paint with 2 coats of paint. You can use either a paint sprayer or brushes and rollers. Use rollers for larger, flat surfaces. If brushing, brush with the grain and always from one end to the other. If paint starts to dry, don't go back over it.