In a sudden wave of inspiration and flood of creativity I decided to make a metalic tank gas holder.
With this object I focused to create realistic bump maps to simulate detailed small parts on the surface of the object. The basic low poly model is around 8K tris. The high poly model is set somewhere around 5 mil. tris to achive better and more detailed bumps on the surface. I also created slightly decayed surface simulation and covered whole model with some fine rusted texture.