The proper and original dash pad is a piece of thin metal covered in foam and then has the material stretched over top of it and laced on the back side like a pair of shoes. The tightening of the laces is what forms the roundness as it compresses at the edges.
The foam stops at the end of the dash and the material, sans foam or metal backer, continues into the door jamb. There is a single flat head screw with trim washer securing each end inside the door jamb. Since our door seal covers this, we are able to terminate it into the seal cleanly, but the original did bot have this style door seal and the end is just cut and glued together then secured with the screw.
Below the dahs pad is a 6mm round aluminum bead, split on the back side, with a piece of fender bead inserted the full length, which is captured by the trim itself, same way you;d do a rubber fender bead on a Beetle fender. It starts at the eyebrow and ends at each end of the dash.
The bottom of the dash pad sits 6mm above the bottom tips of the eyebrow so that it is flush and the trim overall runs left and right and the top of the pad meets the ends of the upper dash where the curve starts the transition from vertical to horizontal.
Look for some original cars for sale online and you'll find plenty of original photos and it's pretty easy to copy.
The dash bead runs $225-325 a set, depending on the supplier, but I've found that it is not the right length for our replicas, so we make our own here by splitting small aluminum tube on the mill and sewing our own bead. Likewise we make our own backer pad for the foam dash pad, but it is specific to a Beck due to our door seal being different from other manufacturers.
