Went back to the logo and cleaned it up a bit more. Decided to go with a cleaner outline, switch up the color to make the whale itself stand out more, better contrast this way. The pointy lines were now too much with the clean outlines, so rounded those out a bit. Feeling more and more settled with this one. It's coming along nicely.
And here's what I'm thinking for the stamp, that I'll use to mark each piece.