Originally Posted by
Euclid440
When you glue your scales together, as said make sure the insides are flat first, then use white glue or rubber cement with a piece of paper between them.
It does not have to be a crazy strong bond, there will be no force trying to separate the joint, just enough to hold them together. So you can shape them.
You can glue a block of wood to the outside of your scales with rubber cement to have something to hold on to and lap the insides flat on a sheet of fine sandpaper.