Horseman
Found where Imron did not even come about until 1970. I have not seen the big difference I would expect in the finish when they would have swapped to Imron.
But in defense of your memory, Imron after a few years of curing would be hard to tell from anything else and its "gumminess" in paper would have been less obvious. So, I would have to concede you are probably right about the mid-'90s BDL finish being Imron.
art
