I spackled and sanded the damaged areas on drywall. I cleaned the walls and used Behr Eggshell paint & primer (in one). Now I can see the walls are uneven. Should I sand again and repaint? If so what grade of sand paper to use? I want to do it myself. Thanks
Are the spots showing as a dull area against a shiner back ground? If so then simply apply another coat of paint.
If not then you will need to re-spackle the affected spots, sand and prime with Kilz or Zinsser Cover Stain. The primer is available in quarts or spray cans for small areas. With a real primer you will be able to easily see if the spots are good and if not continue to work on them.