I have been asked to make an ible of how to paint a camoflauge pattern with a rust effect as in my https://www.instructables.com/id/Camoflauge-B-ATM-03-FATTY-GROUND-CUSTOM-airbrushe/... Well, here it is!
You will need in general for the rust effect:
Aibrush ( I will be using the Sparkman 2.0mm)+ airpump
Tamiya (or any other brand) brown (and I mean many types of brown, preferably 4) acrylic paints (and maybe a green or two)
Something to paint (I will be using a white Lego block)
Salt (I will explain why you need this later)
toothpicks + Masking tape (or something you can use to hold onto the pieces)
blocks of wood with holes (or something to hold up your wet painted pieces