Before I button down the hatches?

Looks much better without the prop wash.   Now to give the imprssion of speed through the water you need to add some bow wave, secondary waves, and stern wake.   See the article by Don Simon at SteelNavy which includes some tips for modeling them

http://www.steelnavy.com/WavePatterns.htm

*peers closely at the bottom, looking for the in-scale crabs and other marine life*

Kidding! I think you did the right thing with the prop wash, that display you have is VERY eye-catching as is. Ed's right, try some wake detailing. I use acrylic paints for that because they dry quicker, but maybe on the smooth plastic of your base oils would be better. Dunno.

My only thought is, is there going to be a top over this to keep the dust off this awesome creation?

mfsob wrote:

*peers closely at the bottom, looking for the in-scale crabs and other marine life*

Don't encourage him.   Less is more.

Where's the submarine???

   I know how fast this thing can go,......... submarine's far astern!

(being chased by Desron32, and Task Group Alpha)

Now I understand why you were trying to get the prop wash effect!

Very eye-catching mode of display - good work.

Michael