This is what disc sanders are for. I'm talking about the stationary machines
with a table.

One trick you can do is jury-rig the same thing using your belt sander. Clamp
it on its side to a workbench. Then clamp a piece of plywood to the table. Make
sure it is 90° to the belt. Turn the belt sander on and use both hands to move
your oval sign against the sander.

Dan

"designbysue" wrote in message
m...
Hoping this is a good place to ask - I have to make an oval sign out
of 3/4 MDF. I am using a jig saw to cut the basic shape. My
question is what is the best tool to sand to the finish shape? If I
use a belt sander or orbital sander, I can get the shape, but the
edges are not perfectly 90 degrees to the surface. Is there a tool
that I could use ( or a jig for a tool) that would finish the edge to
a 90 degree angle?