Several years ago, I had a long galley kitchen with those dark oak coloured doors which were so popular a decade or so ago. Good, solid wood ones. Was loath to see them go to landfill, and to pay stupid amounts of money to have them all replaced, probably by something nowhere near as good. Did a lot of research and found a lovely company who came in one week, took them all away, top and bottom and drawer fronts, and a week later returned and re-fitted them beautifully, having cleaned and sprayed them white.
Made the most incredible difference. Cost only a tiny percentage of replacing them. This was about seven years before I sold that house, and they still looked pretty good then.
I will try to attach before and after photos.