Orbital sanders are useful for smoothing rough edges of cut material, no matter how it was cut. The orbital sander allows for smooth, scratch free finish on whatever material you are using.
Step 1: Prepare the Sander
Before you begin sanding, make sure the disk of the sander has proper sandpaper attached; the ideal grain of the sandpaper is dependent on the material you are sanding, but generally any sandpaper will be enough to remove splinters. Make sure that the sandpaper already on the sander does still have grit; if it is too old/used, replace it before sanding.
Step 2: Preparing Material
As usual, make sure that the material you are sanding is in a vice, or securely clamped to a table or another solid surface.
Step 3: Sanding the Material
When you turn the sander on, make sure you let it spin up to full speed before making contact with the material. Let the sander move in the direction of the grain (this is its natural motion), and don't press down on the sander. The weight of the sander and your arm will cause enough pressure to get the job done.
Make sure not to tilt the sander, and keep at least 3/4 of the sanding pad on the material to make sure you don't create any indents or accidental round edges
Cover all rough surfaces of the material until the edges have been thoroughly smoothed and you have removed all splinters.
Lift the sander off of the material before allowing it to slow down/ turn off.
Step 4: Clean Up
Unplug the sander, put it back where it belongs, and sweep/ vacuum your area to remove any dust that has been produced.