Overall a very good prop, now that you've made the texture size somewhat reasonable. More spec on the paint, more spec on the metal. Dumpster paint is somewhat glossy, the whole thing needs a sheen -- to separate the materials, the metal should be brighter and most likely a different color. Also put that wear into your…
Anti-Air Lav that I am working on still need to beat up the wheels, turret and work on the spec map. Its coming in at 5200 tris with 3x1024 diffuse, normal and spec.
you need to observe how "specularity" in everything you see. not all things reflect white light (its actually the sky or a certain light source). b&w spec maps give off that plastic look and sometimes metal. colored spec maps adds vibrancy to the overall material of the model. like Mashru's Hellboy, look at specularity of…