How do I paint with chalk board paint without getting streaks?
+5
I'm getting brush strokes that are horrible! Using a nylon paint brush.
Try a small roller. If you use a brush, it's best to invest in a good one. Cheap ones can leave clumps unfortunately.
Sand it all down so it is smooth and use small white dense foam roller for a smoother finish. Cari is correct about buying good paint brushes. Wooster is a good brand or Purdy--found at Home Depot or Menards. I do not like nylon brushes as they leave lots of brush marks. You can also buy a spray chalkboard paint for the smoothest finish.
Maybe these tips will help, along with those above:
https://www.doityourself.com/stry/7-tips-for-applying-chalkboard-paint
Chalk paint or chalkboard paint? To separate formulas.
Your brush is not too good .. but all chalk paint needs to lightly sand off