fun subject! All you need now is a forest fire. Can you drop fire retardant with this one, like you could with the FS-KBT Orion tankers?
Repaint-wise, might I make a few suggestions?
The '09' on the tail is too small
the registration needs to be further forward, and a bit larger I think
the antiglare panel has a rounded frontal edge
the bottom part of the fuselage and the engines and wings are bare aluminium I feel
the red stripe should wrap around the nose I think
The textures look a bit blurry, so maybe you need to save them without mipmaps?
Also, I would turn up the AA in your sim, or better, on your graphics card, to get rid of the jaggies.