When I do the class I introduce students to beading directly onto the leather vamp. However, if you are doing a solid design like a mandala you can bead onto a heavy weight interfacing and then stitch that onto the moc vamp. It is MUCH easier to bead on the interfacing. If you look closely at Dionne’s mocs you can see the edge of the interfacing on the outside edge of the beading. She has used this technique.