Okay, but seriously, who has enough rust just sitting around to make that shit? You're like the third person I've seen talk about thermite, and that shit is ridiculous to make.

Then you have to go through all the trouble of somehow igniting the thermite and getting it away from your drone...

The same can really be said for a can of spray paint. I want to see someone actually design that shit before I'd believe it's possible. Maybe someone with a lot of tinkering time, but not the majority of us just trying to buy parts from a hobby store.