You didn't mention the year of your car, but ...
People think that we have always had plastics. But we haven't. It, like transistors, are a recent invention.
Just remember the single word mentioned to Dustin Hoffman in the movie "The Graduate".
They first appeared as Bakelite; a hard, yet resilient plastic in our rotary dial phones from the mid fifties (remember them?). Then as the fiber size became smaller and stronger nylon appears in fabrics as reinforcement for tires, in seat belts, and spread from there. PCV replaced cloth as insulation in wiring in the late fifties (why your wiring is so brittle today) and fiberglass was used first in the automotive industry in the early fifties. But it took until the late sixties to see ABS plastics in your interior.
Finally 3M foam trim tape didn't appear until the early eighties. So unless you are talking about a mid eighties full size car it was put on by a body shop or end user after that time.