I've just uploaded about 90 new seamless metal textures. All are 2048X2048. Some have a "camo" look and might work well for military-themed objects. Others have intriguing patterns that might look cool in fantasy-based things. And some are just plain weird looking, but what the heck...give them a look. Hopefully some of them will be helpful.
http://soundimage.org/txr-metal/
(Scroll down...they live toward the bottom of the page.)
Have a good weekend! :)