Same PzKpfw IV from a few days ago, this time with a muddy under carriage.
Vallejo Pigments (Rust and Oil) applied with a mix of Matt Medium, White Glue and water. Applying the pigments was an interesting experience. First I coated the area to make muddy with the medium mix, then applied Burnt Umber from the pot. After letting it dry for 30 minutes, I applied spots of Dark Yellow Ochre. The amount of fluid on the brush is important. A wet brush makes for a smooth smear not unlike paint. A dry brush applies the pigments with the the grain intact.