heres a good way...
1 go to petro canada, shell, sunoco or some type of petrolium fuel station, and ask for a special type of paint otherwise known as gasoline... then you need to get a lighter, trust me on this one, the flame will make the paint dry quicker.
1. thoroughly soak the 'airsoft gun' in the gasoline.
2. ignite flame from safe distance.
3. allow flame to touch 'airsoft gun' for 3 seconds.
4. enjoy your charred black paintjob.
