Valdez
. Like mixing ratios etc
Well, each product is different.
Both Luke Towen and Kathy Millet just use a couple drops of acrylic paint.
Now, the exact point of the WS water is to be transparent, to be able to be seen through, to some extent.
For a ship as large as Missouri, you are looking at rather a huge qualtity of very expensive transparent resin you'd rather not be transparent.
Now, this is your model, not mine, but, I might have some useful advice to offer, what with having done an 1/400(?) IJN Kongo in a moored setting, and had to figure out the "how" to do so. And, this was back circa 1980, a pint of cyrstal clear acrylic resin was about $60-70 (well over $150 in 2019 dollars).
What I did, then, was bum some plexiglass sheet off a sign company I was close to. Traced the hull contour at the waterline (a bulged hueel, too, to keep it complicated) onto cardboard. Which took several tries to get to "good enough." That hole was transfered to the plex. The plex was cut off enough to make a deep enough "box" to hide the hull. The hull was then set in to the plex with clear silicone sealant. But, only after the box was painted a suitable anchorage sort of color. The ripples wer added by using a painting item, Clear Gloss Gel. Effect was ok. Sadly, all the photos were on a Kodak 110 camera next-day process, and are now long gone.
What I would do, today, would be different. I'd use grigid styrene foam to block the base up, leaving a ship-size void., pretty much cut to nearly an exact fit. Washers would go under the hull to get the correct attitude and waterline. For the water surface, I'd propbaly use pre-mixed drywall compound, as it dries smooth as plaster without bein g as big a hassle as plaster of paris can be.
That would be overlaid with Gel Medium after being painted "anchorage" color. Now, I can get Gel Medium reasonably sheap; but the WS "Water Effects" would not be horrible to use. The Gel medium, for my 2¢, would be easier to set boats and a Mooring Buoy into. The Gel Medium will fill in any gaps between surface effect the ship, too.
But, that's my 2¢, I'm just an old geezer o nthe intertuubs