This is amazing!! I plan on trying it out on my cyma ak101.
Just a warning even if you know about it or it has been said already:
Steel wool, from the metal aging affect, starts on fire if tuched by any battery and possibly other electically charged equiptment. If you have an aeg or keep any other batteries around, make sure to move them. You could end up wasting some steel wool or even burning your finger.
BUT, if you are finished with the job, it's fun to do it on purpose. Seriously, who doesn't like to start stuff on fire. Just dont try it on a $30 aeg battery- something sma