How do I remove the backing from foam board insulation?

Hi Everyone,
I have some 4 X 8 sheets of 1" foam insulation that I'd like to use as a roadbed for a model train layout. The problem is that this is the type of foam board that has a metallic backing sheet glued to it. I'd like to remove this backing so I don't have to worry about shorts on the table.

Tearing and scraping don't work every well. Is there some sort solvent I can use to remove the backing without dissolving the foam in the process?

Thanks to all for taking the time to read this. Have a good day!

Big Al Mintaka
Hi Shazhad,
That actually sounds like a good idea. The fumes might be an issue, though. Applying the heat outside with the board downwind would probably be ok.

BTW, that's an interesting way to advertise gloves. But do you really think you'll find your target audience in this thread?

Tags: big al, btw, foam board, foam insulation, gloves, mintaka, model train layout, quot, roadbed, solvent, taking the time, target audience, there some sort