I did some experiments with Ferric Chloride on 3mm and 1mm aluminium (6063-T5). It's a good thing I did it outside.
This is the same stuff they use for PCB etching, and I've gotten most of the information from there too. I'm hoping to try some photoresist techniques and watching the epoxy melt into an even bigger mess than this. Another idea I have is to continually wash the etching solution away and reapply, automated of course.
In other news, I got another drill today. This time attached to a bit of extruded slotted aluminium and jokingly called a mini-lathe. I don't really think it's gunna be good for much, but it was cheap.
