@taysrag
Duct tape definitly gets tackier as it ages and then leaves all of your pins sticky. For a few dollars more you can purchase Gaffers tape. While related to duct tape, it differs in that it can be removed cleanly. Therefore not goopy sticky, but holds just as securely! It's also a pretty black color.

I haven't made my Dressform yet because I'm moving overseas soon, but am super excited to try this out using gaffers tape.

Thank you everyone for all of your great tips and ideas!