This Instructable will show you how to turn your plastic Nerf gun into a badass gunmetal-style weapon! Since it's a paintjob it's relatively easy, cheap and works with every Nerf model - you can even apply the technique to other gear like fake hand granades or flashlights.
The classic gunmetal style is the used look of real guns. It develops when use, transport and weather rub down the black or dark green protective varnish of the gun and leave behind edges and areas of bare metal. In this paintjob, we work the other way round: on a black primer some fine highlights of metallic silver are applyed, creating the same gunmetal effect as seen in real life.
Since you have to open your gun anyway, consider a power mod (a modification that increases the range of your gun) or additional features while your at it (tutorials can be found on the internet).
Since I'm not a native speaker please excuse my flawed english ;)