I made some mud flaps for my honcho. I happen to have had some conveyor belt laying around and cut a price off of it and made mud flaps I cut 2 holes in them and got a little dowl rod and zip tied them together and stuck it to the chassis by the taillights
U could rough up the plastic u have in a spot to make it stick with glue. There's no pour for the glue to hold onto is y its not sticking.