Tell us about yourself!
Thanks for the instructable. I threw it together in one evening pretty much. Like others I used an old sleeve for the fake arm. Even without makeup on my hand people were fooled on which one is real. Looking @MarkC109's video below I see that practicing with the hand can make it even more creepy/realistic.
According to SharkBite they are permanent. So, depending on your level of trust... I used SharkBite on a connection 5+ years ago (Cu to Cu) with no problems so far.