I used a plastic moulding from a Hyundai I was wrecking and melted the plastics together and mixed them well about 2ml each side. It made a good bond. I dropped STranger a few more times
and re-welded the cover 2 or 3 more times, sometimes new cracks, sometimes repeating broken old cracks. eventually I had to get a new cowling because the old one was like a jigsaw puzzle.
STrangers cowl always had 100mph tape on him.