If you’ve ever tried to solder to aluminum, you know it isn’t easy without some kind of special technique. [SimpleTronic] recently showed a method that chemically plates copper onto aluminum ...

Solder doesn't stick to aluminum at all, and solder wouldn't be anywhere near strong enough to hold up that load even if it did. I doubt duct tape would work either, but I'd have to see the break ...

That’s usually epoxy-based paint for [bdk6]. Of course, you can also dye aluminum while anodizing it. Soldering aluminum also has its challenges.