Thank you everyone for the terrific comments thet are very much appreciated, Mike the dust effect was created with Bragdon pigments the colours used were "dustbowl brown" and "weathered barn" SMJ, i went with the polished look on this barrel because it showed the rifling off quite nicely although the pics show it to be much shinier than it actually is.
Steve as they say the camera never lies and there was a wheel on each side that was a little off but both are fixed now, thanks bud.
Thanks again everyone im glad you guys liked it i know i was very happy with the result.