Thanks for the reply, here's a screenshot of the UV's, yes they are small shells, there are a lot of parts to all fit on one texture. I let Maya pack the UV's and set padding to 4
I left the bake settings on default, and also played around with them but seemed to always generate the same result.

I just ignored it though and went ahead slapping default materials on as a start, and I'ts not too noticeable, as long as the camera doesn't get too close. I'd still like to know why though

