The majority of the work was put towards masking and painting. I primed the model with Mr. Surfacer and then everything else was painted using Vallejo acrylic paints, including weathering done with glazes and dry brushing.
The "water" is Aves Apoxie Sculpt two-part putty, mixed, put between sheets of wax paper and rolled out with a rolling pin. After it started to harden I pressed the ship's hull into the putty, to give an impression of the hull for later mounting, and then removed it to allow the putty to dry. Afterwards I painted it various shades and layers and glazes of green and brown (Mississippi River colors), applied acrylic gel to hold the ship and form waves and wakes, and then sealed with several coats of red-brown tinted Future floor wax. The flag and nameplate were made in Photoshop and printed on an inkjet printer.