My thought was the same as Roy's--a nice job on that grey finish, but unfortunately, late Tigers were painted in Dark Yellow. Generally anything with zimmerit will be painted in that shade.
Having said that, you did a really nice job on the shading of the grey. Don't know what you painted it with, but "Simple Green" does a mean, quick job of stripping acrylics in like, a half hour, clean! Hopefully you could paint it in the correct color and have a real contest winner!