how can i fill in a small hole in plastic trim? its about the size of a nickle, but not completely round, in the greyish trim around my cars passenger side door. the trim is basically thin plastic and a part of it just broke apart. i glued up the pieces that i could find but theres one missing right in the center i was thinking of taking another peice of plastic roughly the size and shape of the hole, and just wedging it in there, then lathering it with some sort of plastic epoxy? any other suggestions?