Wooden ceiling painting (airless) - Color recommendation?

I also want to paint or varnish about 70m2 of wooden ceiling. An XLVP device is available. Would you recommend paint or varnish? And which manufacturer or product? What is better or healthier in the bedroom?

Definitely a glaze for wood, not varnish. Wood moves and therefore needs something flexible. We used one from Remmers on the house, also in white; it didn't cover 100%, you can still see the wood grain. We like it that way. Just go to the hardware store; they have small sample boards where you can see how it will look.

Definitely a glaze for wood

I personally would also glaze!

Actually just get the ceiling white

3 in 1 wood ceiling paint

With this you could save the step of priming. It's 3 in 1: priming, isolating, applying paint.
Isolation is important if you can assume that the wood bleeds. That would be the case with hardwoods with a high tannin content. With pine or spruce, nothing should bleed. With PVC definitely not. I think the expensive 3 in 1 is not necessary.

Priming and painting

Sanding is only done if the wood is painted, i.e. has a layer on it. Or PVC. Old paneling and beams usually only have stain or glaze on them to preserve the structure/grain. If the wood is oiled, it will probably always come through, nothing covers that.
Primer is a base coat that creates adhesion between the wood and the topcoat. Necessary for furniture that will be used later (kitchen furniture). For a ceiling, in my opinion, you don’t need a primer with wood.

You see, everything basically depends on the paneling, which wood/material, which previous treatment, what condition it is in.

I would orient myself towards a varnish glaze. Also, as Silke suggests, take a look at the small panels in the hardware store. But keep in mind that you will probably have to paint/spray at least twice if you skip priming.
Many swear by chalk paint/Miss Pompadour, but I often think you can get something cheaper for the ceiling. But looking into Miss Pompadour doesn’t hurt. Whether you can spray it, I don’t know.
Maybe check again what you have on the ceiling and possibly post a photo here.

Thank you very much for your answers.
We want the ceiling completely white, so unfortunately the glaze is now out of the question.
I would take the Jäger 319 crowns.
I am attaching a photo of the panels.

Now I have the question of how smooth the wood needs to be sanded. In some places, especially in the grooves, the wood is quite rough. Does it have to be completely fine or does the paint fill it enough so that it can no longer be seen from below?