47-38 Planetary Defense Force
Leman Russ Battle Tank: heavy weathering
Step 1: Rust layer
Prime black. VMA Mahogany as base layer. VMC Hull Red as heavy dry brush. 2:1 mix VMA Mud Brown : VGC Orange Fire as dry brush. VMC Silver as very light dry brush. Gloss seal. Apply chipping medium.
Step 2: Camo layer
Tamiya (Tam) XF71 Cockpit Green with airbrush. Tam XF62 Olive Drab with airbrush to modulate panels. Tam XF52 Flat Earth with airbrush to create loose pattern. Tam XF15 Flat Flesh with airbrush to finalize camo pattern.
Step 3: Heavy Chipping
Using a wet toothbrush scrub aggressively. Focus your strokes from top to bottom and in corners where water would pool. Gloss seal when satisfied with effect.
Step 4: Weathering
Apply decals and allow to set overnight. VMC German Grey as very light stippling with a sponge (this represents normal dirt/grime, apply everywhere). 1:1 mix Tam Flat Earth : Tam Flat Flesh heavily thinned with airbrush into corners and flat surfaces (this represents dust). Gloss seal. Apply small drops of Burnt Sienna oil paint to exposed metal bits. Then apply turpentine to either the drop or right above it. Use the turpentine to thin the oil and draw it where rust streaks would occur.
When satified seal with gloss coat for protection then seal with flat coat for looks.
For a tutoring point, a description of what steps you took would be great.
Step by step tutorial coming soon. I was just getting the photos up.