My kitchen walls are plaster. I had some areas touched up w/plaster. Then they were sanded. Thena tinted primer (kilz) was put on. I can see the plaster patches thrugh the tinted primer and also there are brush marks all over.
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We were not planning on painting them for a few weeks. Should there be all those spots coming through the primer? It is an oil based primer. Wer they not sanded correctly? This was done by a licensed painter. I feel like I was ripped! Can you help?

It isn't clear what you are seeing when you say you "see" the patches through the tinted primer.

If the repaired spots are smooth and feathered out without out any ridges or bumps - they have been patched and sanded correctly.

Are you seeing poor hiding of the finish coat and the tinted primer is showing through the top coat? If so you need to recoat over the primer to obtain full hiding and coverage.

What I suspect you are seeing is referred to as "flashing" in painting vocabulary. It is hard to do invisible spot repairs. The repaired area will have a different sheen and color than the original painted surface in part because of the stain blocker primer used. If this is the case you will need to prime the whole wall (or ceiling) and paint the whole wall.

If you have some brush marks in the previous paint you will need to skim over them with spackle to eliminate them prior to priming and painting.

If when you say 'plaster' you are referring to the real 'lath and plaster' materials in your kitchen then don't feel ripped. When that heavy type of material is patched its very difficult to hide the old texture with the new no matter what painting has gone on top of it.

This might not be the idea you are looking for, but we had this problem also and I used the tissue paper technique to create a little texture on the walls which hides imperfections very well.