Too funny. I always think the same phrase, "Not museum quality" when crafting my own items. But they are good and I'm proud of them.
You should be proud of yours, too. That's a very nice piece.
I used my 3lb downrigger weight mold, and made balls of Bondo car body putty. Worked good, use silicone spray or vaseline for a release agent.
To Clarify, the 3lb was for the soda can mortar.