A difficult one with a raised edge, as the top part would certainly try to kink upwards.......a flat trim would be much easier.
Best to bend the stuff around a timber former, and applying heat with a hot air gun would help matters greatly.
It could be a good move to use a spare piece of trim for practice!
John
If you have to radius the corner then cut the return towards the face at about 20mm intervals (leaving the face intact), fit the trim and then mat, resin and topcoat over the cuts. Easy life.
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