Keep going over it. I can see three distinct colors. Grey. White. And grey mixed with white. You might try this... Every part of the weapon to be white, or near white, paint white. Every pat to be grey or near grey, paint grey. Then, work towards the middle. So if you\'re starting on a white part, you go towards the grey with many many many many layers. Each layer, add a tiny tiny tiny bit of grey to the white.
Finally, when you reach the grey, the mix should be almost all grey with a dot of white.
You won\'t have done it perfectly, so then this is your next chance to start with pure grey and slowly add dots of white going in the opposite direction you came...
rinse and repeat! Do that a bunch for practice and perfection. Oh, and make sure your paints dont separate, you\'re whites look a little chalky, a problem I had. Maybe use a matt medium. Or vellejo white.
I HOPE THIS HELPS!!!!!!!!