The Foil Burnisher is a great tool for fixing and smoothing down copper foil. It will help you to achieve a uniform line for solder.

The burnisher has three uses. Use the handy roller end to roll over the foiled edge. Use the notch at the top of the handle to burnish the edge. Also, use the rounded end to rub the foil. Lightly roll the surface of the foil to smooth and burnish evenly to the glass.

The objective of foiling is to lay down a road map for the solder to follow. Burnishing the foil on the front and back go the glass pieces is desirable for a smooth track for the solder.