Hi everyone. I am in the process of building a 1/48 Monogram B-25J and am wondering how to weather over top of the very dark OD finish, especially for the panel lines, even the exhaust stains may be hard to pick-up, the little pre-shading that I did is completely gone. I used Tamiya acrylic OD.
Here is a shot of it after the future coat in preperation for the decals.

I would appreciate any and all advice.
Thanks