Belt Sander Seam Rubber

A Seam Rubber is used for smoothing Stitches and folding Creases into Canvas, it's like a Sailmakers Iron.

Find a piece of Hardwood long enough for your Seam Rubber and let it dry.

Split the Wood into Quarters.

Use if possible an Axe with an wide Head like a Splitting Maul.

You could use a Hatchet to roughly shape the Wood, that way you won't need as much sanding.

Sand the Sides flat into a rectangular Profile.

Taper one End into a short Wedge.

Slim down the Handle to a comfortable Thickness.

Use a Roll of the Sander to create the Bevels.

Rotate the Handle holding at the Wedge to sand the Handle round.