Two part poly Like Interlux Perfection PLus, Bristal two part poly, clear AwlGrip and Sterling will not stick to oil based anything, not even over oil based stain and oily finger prints. You will get the worst case of cat eyes , blisters and dry glossless areas. At least that has been my experience. Finishes like oil based Varathane do not hold up in a marine environment.
I am experimenting with 10 coats of Interlux Perfection Plus on some teak doors on my flying bridge. Protected by canvas they still look good after 6 months. I was building a Mahogany drop leaf table and sprayed the doors at the same time as the table. The doors are never in the direct sun.