its not green, its a good black paint, not a hint of green, at least i presume its paint. Certainly not blued, but it wasn't really very obvious til i cleaned off the heavy grease. Seems the paint is very solvent resistant too, since i tried acetone, trike and white spirit to remove the grease. one is a bit deteriorated, the paint only, so i might try to strip that and try a bit of DIY blueing.