Having heard from several sources that this was the case (but not believing it), I called their sales department. Apparently Trinidad SR has been discontinued because Pettit got tired of “fighting the Irgarol battle”, as a technical sales rep just told me. They’ve decided to go back to an older, non-Irgarol formulation of the paint and it is available as Trinidad Pro, which used to be available through boatyards only but now will be available everywhere.