Key casting with toothpaste and talc prison trick
Toothpaste and talc putty used for casting a key see vid
Prisoner trick that does work tested with a alloy .....sure maybe It needed a bit of vibration at the end
but that's tested and ago in my books may be try this yourself and report back with your own
Results on the doe's and don'ts given different key profiles
Interesting all the same .. ingenious idea For a emergency key
Maybe for a restricted profile you have never been able to find a blank for in a lock collection
that you want a copy of just incase , looks alot of fun so it's in the key making section on forum
https://youtu.be/F5S75et8SRs