Dear Franzesco,
What a perfect paint job. I envy your technical abbilities.
But, please, allow me one comment: these vehicles were kept secret until the very moment they were used in an obscure trial (which was a crime by War Law) to reach the Schelde area from the Ardenne region in a lay out (as US vehicles and troops) that would create the confusion amongst US troops, needed to break through the Allied lines. Therefore, all these vehicles were completely reshaped and repainted in olive drab, and only used in the attempt to break through. Therefore, your weathering and rust marks are historically less likely.
Nevertheless: I surely admire the way you have shown me what is technically possible. RESPECT for that. My comment is only directed to the subject, absolutely NOT the techniques used. I admit that I can learn a lot from you without any doubt.
Regards,
Paul