Well, like a big dummy I decided to test this
Russian aluminum flux by trying to flow SnPb on the bottom of a coke can...
I used my 5/16 Ultra Performance tip at 700F, put a puddle of flux on the can, waited a bit for the bubbles to start, then put the iron and the solder in the puddle.
Well, good news, the solder flowed on a Canada Dry Ginger Ale (100% natural flavour (with the "u"), 355mL) can... but now my lovely tip is crusty and black. No amount of sponging, brassing, or Multicore TTC-1 Tip Tinner Cleanering is fixing it.
So kids, be careful; if your Ginger Ale can needs soldering, try something else than 15$ soldering iron ips.