I don't know if you can tell, in these pics, but I have covered most of the green with dark sea blue and created a pleasing effect, I think.


Here is a note about the Plastruct "agitated water" sheet. It is possible to paint it too, much (even with air brush) to where you minimize the texture of it. The PT Boat experiment piece has been painted with spray can enamel, too, and it has become more smooth than the original piece.
Yesterday, I experimented with adding distilled water to the Liquitex gel to make it flow easier so that it can be poored onto the surface. This works pretty well. I used a 1:1 ratio and the water stays mixed up, but when it is stirred, some lumps remain. Shaking it in a covered container works to mix it well, but it must be allowed to settle, otherwise there are a lot air bubbles when it dries and it dries frosty instead of clear.
I've taken this and poored it onto a piece Tamiya OEP and it reduces the texture of that ocean effect, pretty well, but it might take a couple of applications.
Photos of this experiement wouldn't show the effect of this technique very well.
I've even applied thick Liquitex to a surface and blew it with low pressure air, about 40 - 100psi. This makes some cool waves, but the Liquitex doesn't blow evenly as it dries. This blowing method makes for nicer waves than touching the thick LIquitex with anything solid.