Just to clarify, it wasn’t the No Nonsense that failed drastically but a different brand. The No Nonsense sticks to about 75% of the gel coated dome but not all especially – where a thin coating. I really wonder if roughening with some emery paper or something similar might have provided a better key.
Thanks for the steer to Gorilla and DOW 785. Have been pondering one of the Soudals too.