I spent the afternoon messing around with the texture and (mostly, as this was time-consuming) adding details such as the railings, ropes, anchors, &c. Those nearly impossible to see objects DO make a difference, however, as does the more grungy texture.

To get this "salt/rust patina" effect, I added transparent noise layers over the base color in photoshop. Not the utmost in life-like, but it will work for now (anyone have any ideas, do please let me know!)

Here's a picture of the latest edition. Hope you like it!