Personally I think that's a bit excessive, there's maybe 5 feet of space under those decks so to get that high up and pool would be ridiculous, but maybe have a couple grease trails running down the frame from the pushrods?
Another spot I though of is the little pit full of plumbing (hydraulic, I think) behind the attack scope column and forward of the main pump in the control room, starboard side.
On a seperate note, now that I think of it, I dunno why the pushrods of those engines would be rusty in the first place... They'd seize if they really were rusty...
