[Inkscape-user] Suggestions for tiling a car wrap

I am building a tiny electric car, and it has bikini-level fiberglas body components, about 30 sq ft. We've settled on a fish-scale graphic design to be done with vinyl car-wrap.

I've never done a big tiling job, and I'd like to have a lot of color&detail variation, very much like a real fish. Any suggestions, or a tutorial I missed?