Got the side roof started today...Needs a bit of rust and crud...So I thought of the DR........
Started with some red oxide primer, then some salt and baking powder, let it dry and then I sprayed some alum metalizer on it, and let dry overnight...I did rough up some parts of it and a couple of creases for character...This morning I used a stiff brush to remove some texture, showing the "rust" under.Then a shot of dullkote and now a bit of weathering with some ink wash......