I am trying to draw a curved chair back with a scallop shape on the top. I am having some issues with the surface not completing. Theres also another little funny problem where it looks like im seeing the back of the face on a small portion, but cant select it to flip it. Its also not missing as far as I can tell.
So on the left end there’s a couple of faces missing. Drawing in the edge they need to form will fix that. At the right end the faces are reversed. Selecting them and reversing them will take care of that.
How did you go about creating the rail? Did you cut this out of the shape in the background?
For someting like you show in your photo I would imagine the volume of space a large cutter would pass through to make that cut. Model the shape of the volume and make it a solid component or group. Make the piece of wood a solid component, too. then use Trim or Subtract from either the native Solid Tools or Eneroth Solid tools to make the cut.
Is that hollow concave like part of a sphere was cut out or is it flat like you’ve get by cutting it at the bandsaw with the table tilted.
In @DaveR 's image you will notice the dashed lines joining the little faces on the curved surface. They are there because he turned on View->Hidden Geometry. You have to be able to see them to select the little faces making up the curved surface.