So they are the same hard material that widow trim stainless is and not the same material the headlight bezel are?
The 67 (early 68 ) stainless moldings have a sharp edge on them. And the material folds back on itself a little until it makes the flat portion that screws to the fender.
Here's a set of stainless moldings. The straight piece on top (rocker spear) and the masking taped pieces (hood trim) are aluminum.