Now that I’ve sanded that off smooth the next thing that needs to get sanded are the surfaces of the shelves. You can use a handheld random orbit sander or a handheld belt sander but this drum sander really shines. In this kind of technique it removes a little bit of material each pass through something like a thickness surfacer and the same way you adjust the height of the head is with a knob on top of the machine. (You don’t want to move in increments more than say one 64th inch)
Once sanding is done, simply remove the existing sandpaper and replace it with a finer grit and you repeat the process.
Now as you saw earlier these shelves one end fits into a square corner so this end needs to remain at 90 degrees but the opposite end is exposed. To add some shape and detail to the shelf, I just sketched a shallow curve onto the end. I’m going to cut that on the band saw. Set your blade to 1/2″
The way these shelves managed to float on the wall is that they’re held there by a bracket hardware that gets screwed to the wall and a pin that slides into a hole that you drill into the shelf.
Note: It’s best if they are attached to wall studs that’s how they’re strongest and most secure but if you can’t find a wall stud for both of them then you can use wall anchors.