Prep work to paint over stained cabinets and doors

Clean well to remove any grease or food that may be on them. Sand lightly and wipe down. Then paint

I would first wash your cabinets with TSP solution and then sand the surface when it is dry. Use a tack cloth to remove any dust or vacuumm and use a good primer and sand in-between coats of all paint. You will get a terrific finish, but just take your time and sand lightly and your surface will be nice a smooth. Have used this method on my varnished kitchen cabinets and it really worked.

Remove the doors and hardware. Mark the doors and cabinets with tape where they go. Lightly sand the doors and cabinets to remove any gloss and roughen the surface for paint. Prime with a stain blocking primer like Zinsser 123. Then paint with your color. Seal with at least three coats with a water based polyurethane. Use a small foam roller and foam brush for a smooth finish.

I usually put all the hardware onto a strip of painters tape & attach it to the shelf of the cupboard that the door came off of. I number the tape & the door so that they all fit as they did before removing them. (You don't misplace the odd screw or two either!)

My suggestion is to place hardware into zip-baggies & set them in the cabinet they came off of.

You may want to consider leaving the recessed parts of the cupboard doors stained, paint around those areas for a nice 'contrast' of colors & textures. try 1 door & see how you like it. I did a gun cabinet for my Dad & he & Mom loved it! sorry I didn't take a pic of it-they live some distance away & don't use cell phones-Dad's 91 years old] Happy Projecting!

Clean with TSP and sand the cabinets.

For safety from bleeding, I would clean it well, sand lightly and use Kilz as a primer. I always use Kilz if there is any possibility of bleeding. i.e. The charcoal grey and chinese red walls in my Son's room, and the mildew stained wall in a closet (the mildew had been removed).