Did the Irwin 27 have something glued . . .
Boats of that era often had carpet or vinyl glued to the topsides. Most times it was a high grade automotive type carpet or else a foamed backed vinyl. I can''t recall what Irwin used on their boats. Irwin is no longer in business. Their boats varied pretty widely in sailing ability and most were pretty mediocre or worse in terms of build quality. Some of the Irwins were aimed at being race boats and were pretty competitive for thier day.