How do you remove an oil stain from composite decking?

Stan K
by Stan K
I moved a snow blower to my composite porch for the up coming winter. After it was moved I noticed it had dripped engine oil on the deck and it soaked into the composite deck. I tried a high powered pressure washer, and hand scrubbed the area with dawn. No noticeable change. The stains were still there. Short of turning the boards over is there away of removing the stains?

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