I was experimenting with etching aluminium today which i must tell you is no fun at all it takes far too long.
Its for a pedal looper thingy im doing.
There was a slight mess up with the actual etching where the dirty side of the enclosure came out a lot grittier and less clean looking overall which was a happy accident.
You cant see it too well in some of the pictures but its etched about 0.5mm deep overall and less in other places ideally i wanted it a bit deeper.
This took around 3 hours with double my normal strength etching solution for pcbs that only takes 3-5 mins on pcbs.
Next time i try this ill be sure to mask things off properly and make the solution a fair bit stronger.
I spilled some nitric (70%) on my shoes at work doing some etching. It now has these cool light splash marks