Since she didn't reply, I'll tell you my own guess (if you still want to know ..lol). I think she's just using heavy duty aluminum foil which most grocery stores carry.
Hello Laura, can you please tell me what is the guage / thickness of the foil that you are using? I have plans & ideas to build small scale cars, similar to old school model etc...I'm planning to experiment with disposable cooking foil pans, maybe even Embossing Foil- Aluminum. What are some of the best Embossing Aluminum to use, strength & flexibility?