I make my own my placing peels in a plastic bottle to ferment.
Have some upstairs (just went, and) checked on it.
On a bike ride I had forgot orange peels in sealed a plastic bag
it fermented , the goo is good to get up grease stains on hands
This day I needed it too
(I wear rubber gloves to fix a bicycle since I play guitar, and bring it with me maybe I forgot that day
or used gloves already for finding stuff in bike shop dumpster )
I saved to post, didn't check inside the bottle of my homemade stuff (thinking I'd have to destroy bottle )
but I did just add more lime juice , and water to ferment it into a liquid, because of this post.
After checking just Now I Am 90% certain enough heat didn't build up, like did on my peels in plastic bag
and not enough Juice to break down they are solid still
Surprisingly I opened, and it smelled fresh
I added left over pulp from sitting out old lime juice that should ferment
I do not plan to add walnut shell ground up , if I had access to a sand blasting material , but do plan to add sand.