door trim

i needed a piece of outside trim for my 87 f-150 pick up. it's the piece that goes across near the bottom of the door. i finally found one. it's about 3 inches wide and the length of the door. what is the best way to put it on? a type of glue or 2 sided tape?? thanks a lot
bill

They are put on with two strips of the narrow two sided body tape. One near the top of the trim and one near the bottom.