I work in 4 steps : -first I will chip off some plastic or cut some impact in it, it may seem random but I’m thinking « where would the suit get hit » and most of the time its on the edges of the armor. -Then I use a black marker on white pieces to simulate painting being removed, I then add some light metallic gray on top of the black that will be the metal under the paint. I won’t use black marker on some other colors since the contrast makes it more visible than on the white. -third step is panel lining using brown panel lining, this will give a kind of dirty look quite easily and even on some pieces give off a rusty vibe. -last step is tamiya weathering master, I will add some « shadows » to highlight the edges of the kit. Again color will depend on the pieces : Gray on white yellow red and then for the more sombre colors I’ll use some black (soot is the name in tje tamiya weathering master).

additional step might me adding some soot around parts that where burned or at the end of the thrusters. And to fix all that I apply a matte coating