This is a re-do of an earlier custom Nightwing I made. Not a terribly difficult custom... except for that turquoise cloth piece across his chest and down his arms. The boot tops and gauntlets are made from a substance called "Tear Mender".  It is manufactured to repair rips in tents and tarps. I sculpted these with sculpey and then cast them in "Tear Mender". When it dries it becomes somewhat like a vinyl material.