Mythbusters already did this
Uh, no, they didn't. They got a simply optical computer fingerprint scanner to accept a fingerprint they made on back in 2011.
If you think Mythbusters could do it, why do you think the FBI and their experts could not do it to the New York drug dealer's iPhone, and they had HIS finger prints in hand. The FBI has some of the top experts in the world for doing this kind of stuff, far more experienced than any of the movie stunt and FX guys on Mythbusters, and they could NOT do it, certainly not within the 48 hour window of opportunity Apple provides for trying that kind of thing.