I decided to try a new method for basing my 1/450 Peter Pig pirate ships for Galleys & Galleons - aluminium 'turkey' foil. It's said this should be used shiny side up. I'm not sure why but I followed suit. Rather than just crumpling it, I rubbed it over the side of a ribbed tin can. I then varied the angle a little and re-rubbed parts to create a more irregular wave effect.
The boats provided an extra challenge as they already have bases. First step was to add some filler around the bases to disguise the edges.