Hard to see how smooth that actually is, but you could try sanding blocks to even it out. With fine cracks, you can wet them and then scrape a filler over them.
It feels pretty smooth but it's really difficult to tell. I think I might try doing a coat of plaster primer to bring up the imperfections and decide what to do after that.
Hard to see how smooth that actually is, but you could try sanding blocks to even it out. With fine cracks, you can wet them and then scrape a filler over them.