Lightly sand a bit, then remove all dust and degrease with ammonia or something and then spraypaint with acrylic or alkyd laquer. Like a spray paint can. They come in many colours and can give a very even satisfying result, much better than painting with a brush or roller. I would go for matt or satin look, but maybe you like shiny, then go for it. Use thin layers and try to not stay on one spot, always keep moving the can. Usually you can apply multiple layers pretty fast with spray cans.

Unless you want to keep the wood look.

edit: I wanted to add: disassemble the parts you want to paint and let the paint harden before you reassemble. multiple days.