I believe what you're seeing is the rough sanding of the epoxy (drips and such) on the glass and some on the wood. Once I wrap the rest of the stringers and sand should be good to go, I believe. The lower portion of the stringers 1x11 rough sawed Cypress, the top in very dry 1x 8 treated pine. I plan on wrap over the edge to the bilge area with a layer of 1708. First I was just going to make it original then I decided to raise the floor and make it a self baling Center Console.