I used marine tex to fill in some large scratches on the bottom of my SF as well as the skeg where the gelcoat had been rubbed off from sand, etc. After sanding the marine tex, there are no bumps but the area is not near as glassey as the rest of the bottom. Is there a product that I need to paint over these areas to make them have that glassey feel? If I leave the marine tex alone will it slow down the boat?