You can paint them if you want to.
get some sanding sealer to close up the rather open grain of that wood. A couple coats, sand with 220 dry and check- it may need a third or more coats and always sand flat (with a sanding block) when you are satisfied the grain is filled.
Then apply paint- I suggest spray, and test it is compatible with your sanding sealer. Generally this is not a problem, but always test.
Finally clear coat if you plan on it. If you do plan a clear coat finish, apply the color as thin as possible with adequate coverage. A good test of coverage is to write with black marker on a white sheet of paper and count the coats needed to cover so that you can't see the marks on the paper.
If you are not doing a clear, apply at least three wet double coats and allow to dry completely- this may be a week or more dependent on your finish. The start blocking it out. Wet block sand with 400 (if needed), 600, 1000 and then buff to final gloss. Similar procedure with a clear coat, but you apply light paint as discussed and (at least) three full wet double coats of clear before the blocking and buffing.
That is very abbreviated, and you should search around for more tips and tricks but that is the VERY basic method.