Just posted in your other thread, trying to get away from the texture painting I take it.

I'm thinking the same as David that model is so nice it will be difficult to do it justice with a texture. I remember seeing a sand speeder on your site and I just watched the tutorial now so it got me thinking about this model as well. In part 11 Jay goes over some really good techniques for creating metallic surfaces in Photoshop, I think it would cover what you need. Do you have the tut? If not let us know and we'll give you the part for model of the month so you can get started no excuses

A good site for downloading good quality high res textures is cgtextures.com I've picked up a lot of nice things from there.