Strange texture problem.. :\

Hi, i've recently had a go at repainting the PMDG 737 , however when i load it up and play it ingame, the textures work but its very 'shiny' to the point of metalic.
And since my repaint was designed to give the plane a more 'dirty' (dust etc.) look, this isnt exactly what i wanted.
is there a cure for this?
And since my repaint was designed to give the plane a more 'dirty' (dust etc.) look, this isnt exactly what i wanted.
is there a cure for this?