I didn't descale it no foil just rub with olive oil some salt n pepper straight to the BBQ. Grilled about 8-10 minutes both sides. Didn't eat the skin meat came right off. Make some slits so it can cook right. Followed this video
https://youtu.be/5wjKnqg67Is
I think iceman holding the record around this area went out to the horseshoe on the kayak