Set of 3 Grot tanks used as Kannons or Lobbas. The treads were made from $1 matchbox tractors, and bulked up with plasticard. The barrels and hulls were made from pen caps with some bits and plasticard. I used yellow Krylon Fusion paint with several washes of brown and black to get that dingy lived in feeling. The same technique was used on my killa kans which are not yet finished.
These are a great cheap unit, and one of the best Ork anti-tank options next to the power klaw. Total cost around $6.