hot foil stamping

Use of Foundry Type in Hot Foil Stamping

I have been doing some hot foil stamping on book covers and spines (bookcloth) and I would appreciate any comments or information on using foundry type in a hot foil stamping machine. While foundry type is a softer metal than that used in hot foil type I think that it would work for small runs, maybe 2 or 3 covers. I base this on the fact that foundry type, which I understand is lead, has a melting point above 600 F degrees while hot stamping requires 300 degrees F or less.