My favorite way to simulate those seams is to not fight gluing down any strips, but use masking tape to define the edges of the seam or seams. You will have to take your time to get a nice, thin opening between the parallel strips of tape, then take a spatula or finger and lay your favorite putty down the entire exposed strip, raking it off flush to the surface of the tape. Immediately remove the tape, leaving a nice raised strip that you can easily sand and contour when dry, then prime and paint! I prefer a catalyzed automotive putty, for speed, but any will do.