I haven't ever put people on 1/700 ships, but I thought that PT boats without a crew would look kind of like little "Mary Celeste's."
The only suitable crew I could find came from Blue Ridge's 3D printed 20mm crew. The have serveral different poses.
They come out of the package like this.
I cut three lines of them out of their nest, then cut each little person apart and stuck them on lids from water bottles, so I could handle them.
I used Vallejo paints; first time I used them and thought they were really good for figures.
Then I tried to brush them with Micro's flat finish, but the flat finished refused to be flat; left them all glossy, even though I shook and stirred the bottle. I ended up putting them all on a strip of masking tape, then spraying them with Humbrol Matte, and they turned out much better.
Some I painted as officers in khaki's, but I used Vallejo's Iraqui sand color; the Vallejo Khaki I thought was too dark. The rest got crew uniforms in light and dark shades of blue.