Brake arcing

[Willit Stop]

I used a strip of sandpaper from an automotive paint store. It measures 2 3/4X 17 and is used for a sanding board or a straight line sander. Just tape it inside the drum and slide the shoe back and fourth. A respirator would be advisable.

[51woodie]

I took a piece of maple and made a sanding block to work on my 12" drums, that I used to arc the shoes on my '46 Coupe. Stick on 80 grit sandpaper worked for me.
The extra 1/16" on the radius is to compensate for the thickness of the sandpaper