Looks great so far! Do you have any plans for a diorama or something? Is it supposed to represent a vehicle that have been left out in a scrapyard after the war? If so, you should add some small patches and streaks of rust.
Thanks Henrik. For now it remains a test bed for new techniques, then the result will be satisfactory if I think I'll add a small base where the tracks destroyed ... abandoned by the Germans for mechanical problems!