Thanks for the great suggestions.
Had to fill (GS) miscuts around handle insert & that is done. I have knife-cut bevels along the edges and will sand it to a smooth bevel (hehe, fat chance) to see if that is workable. If not I like the idea of the sanding board & will use that. The door is all done other than canvas application & hardware so we will see how it turned out later today.
Before Pix: