This is a very small mod I worked on for about an hour in total, it is not perfect but it does the job I wanted it to do. It is to be placed in your map with GIANTS Editor.
Full AO Textures
Authentic rust look
260 polys in total
Scale is 1-1-1 and is quite small ready to be scaled in whatever way you want.
CG Textures (cgtextures.com) for the rust
Special thanks to milpol for teaching me the correct way to AO