its easy. buy some plaster and aluminum baking sheets. superglue the prototype to the baking sheet and pour the plaster over the lure. when dry, bend open the sheet and extract the mold, you might have to soften some of the edges. this part is optional... after the mold is completely dry, after a couple of days, seal the mold. i use modpodge and just brush it in. the sealant gives the baits a nice shiny look.