IT WORKS!...In my (lil') experiment:
Because the oil is already lighter than the (salt)water and has 'cohesive-properties', it was 'easily' removed from my saltwater with the use of minimal 'PROTEIN SKIMMING'...
(Approx. 55-gallons of water containing approx 1-quart of 'dirty' oil was completely removed -'STRIPPED' from the (.022 S.G.)saltwater within (only) approx. 20 minutes at approx. 100-GPH(?), simply 'gravity-fed' (from the water's surface) into a 'home-made' 24"X4" PVC skimmer-column (using only a small-'cheapy' aquarium airpump)...

will 'GIANT' Protein Skimming assist in removing the oil from the the water's surface areas?...These would be relatively inexpensive and could run 24-7 removing huge amounts of contaminants...It seems (to me) that numerous (& titanic) Skimmer units placed close to the marsh areas could (at least) remove a great deal of all incoming matter...I equate it to the 'nasty-foam' you see on beaches everywhere, which was produced simply by the wave's churning action of introducing air into the water's surface area...Enormous amounts of water pumped-drained into huge columns and mixed with compressed air would eliminate huge amounts of contaminates before it reaches shorelines...(???)