I don't know how I missed these, but I don't believe I've posted them before.
A few months ago (okay... almost a year) I was rebuilding lots of sets of carbs when I came across these beauties:
Pretty gross right? That mayonnaise looking stuff is most likely aluminum oxide caused by who knows what. I never confirmed, but the PO said something about 'It looks like someone tried to [unsuccessfully] hide some meth in there.
All the brass was fine but the aluminum bits were ruined. These carbs were scavenged for parts to rebuild others.