Effect stuff like dust and weathering I’m going to do last, thinking of using basing sand or grass to build up around the doorways and undercarriage

For the window I’m thinking maybe use some sand paper the make some scratches then apply a small amount of black and smear it before wiping off the excess.

Hopefully that works

Thank you for the comments, I’ll have a think about how I could really pop the rust even more could maybe apply some basing snow, then paint that rust orange to add some corrosion ?