This went together pretty easily – even the plastic tracks. I acknowledge the spelling mistakes on the radiator lettering, as detailed here.
“The S-65 tractor or Stalinets S-65 was a very popular agricultural tractor built by the Chelyabinsk Tractor Factory (Chelyabinskii Traktornyi Zavod – ChTZ) from 1937 until 1941. These tractors were used in military service as they were widely available and capable of towing heavy guns.”    
Trumpeter 1/35 kit .
This is going to be part of my Berlin diorama. It looks a little lost right now, as it needs some crew and the tractor to tow it.
B-4 M1931 203mm howitzer build – Part 1:Introduction
B-4 M1931 203mm howitzer build – Part 2:Assembly
B-4 M1931 203mm howitzer build – Part 3:Painting
B-4 M1931 203mm howitzer build – Part 4:Weathering
- To simulate paint chipping, Vallejo Model Color “German Camouflage Black Brown” (70822) was applied using sponge.
- The entire gun was washed with a dilute mixture of Winsor & Newton “Raw Umber” and “Lamp Black” oil paint in enamel thinner – the excess being cleaned up with a dry brush or cotton bud.
- Some vertical streaks were added using AMMO Oilbrusher “Starship Filth”.
- AMMO “Oilbrusher” oil paints (“Dusty Earth” A.MIG-3523 and “Medium Soil” A.MIG-3522) were dotted on the much of the horizontal surface, underside, running gear of the vehicle and wheels, which had previously been dampened with enamel thinner. A round brush was used to dilute and blend the oils. The same oils were dotted on the sloping and vertical surfaces. A flat brush was used to draw them down the sides to create dust and rain streaks.
- The entire model was sprayed with a 1:2 mixture of Mr.Color “Flat Clear” (182) and Mr.Color Leveling Thinner.
- AMMO “Europe Earth”, “Rubble” and “Brick Dust” pigments were brushed onto the wheels, running gear, lower gun and tracks and fixed with a 1:1 mixture of AMMO “Pigment Fixer” (A.MIG-3000) and enamel thinners, added by brush. I wanted to convey an impression of dried mud, especially on those parts expected to be in close proximity to the ground and crew, whilst leaving the gun itself less dirty, as you would expect if it were still operational.
- AK Interactive “Dark Steel” (AK086) pigment was brushed on certain parts expected to have wear and tear.
Primer: Tamiya “Fine Surface Primer” (light grey) spray can, applied to the hull and turret.
Basecoat: A 1:2 mixture of Mr.Color “Russian Green (2) – USSR tank late WWII” (136) and Mr.Color Leveling Thinner was sprayed over the entire gun. Then, a 4:1 mixture of Mr.Color “Russian Green (2) – USSR tank late WWII” (136) and Mr.Color “Character White” (107) in Mr.Color Leveling Thinner (1:2 ratio of paint mixture to thinner) was sprayed on the upper parts.
Details: The wooden loading platform was first painted with Mr.Color “Tan” (44). After this two coats of AMMO “Heavy Chipping Effect”, the above green paint was sprayed over. Once dry, I chipped the piece using water and sharp points.
Gloss coat: A 1:2 mixture of Mr.Color “Clear Gloss” (46) and Mr.Color Leveling Thinner was sprayed over the entire model.