Duct tape dress form tips: Wear well-fitted undies. Tape strip of cardstock onto your skin & over undies where form will be cut off (to protect your skin & undies). Then put on a long T-shirt. This remains inside the form, so choose one you don’t mind sacrificing to the project. The T-shirt needn’t be too tight, because the tape pulls it in. A turtleneck T-shirt is ideal, or you can fill in around the neckline with plastic wrap before taping."