htraps

I'm thinking of making the welt of a knife sheath out of plastic sandwiched on both sides with leather rather then building up the welt with multiple layers of leather. I have ordered some bakelite which I assume will glue and cut/machine well but am now hesitant because its damn hard stuff and have some concern about it damaging the edge. Has anyone had success gluing plastic to leather? What plastic should I be looking at for this purpose?