Would the pastry be ruined if I use aluminum foil rather than wax paper?
this is not the best answer but simply you question is too big to be answered here and how can s.one transmit you an experience via an answer!! go buy one.
Martin actually HAS a kit for building your own Martin guitarcheck their web site
If those are your only options, go with the foilBut if you have any parchment paper, I'd try that insteadHope it turns out well!
