I have a prop blade that I ordered in the mail, but the sheath came broken in half. Rather than return it, I'm thinking of just repairing it myself. The sheath is made out of PVC, so I figure I can use an adhesive to glue it back together and just use some spray paint to get rid of the chipped coloring. But I would like to fill in the missing details so the crack doesn't look so "caved in". How could I go about doing this?