Thanks Scot. 

There'll be a slight delay in releasing the mech one - I was a little over ambitious here :) 
Because of the file size - it's nealy 8mb I need a new home for it. 

Does anyone know of a good free file hosting service with no popups or drive by nastys ? 

As an aside - One trick is to use the Alien Skin Edge filter on a filled selection, copy that and fill the 'edge' with a metal texture. Paste it back over the original map and use an undo brush on he areas which wouldn't  recieve any 'damage'.  

Very time consuming on a large model but very effectiive.    

If theres enough interest I'll write up a tutorial.   

Pinky - you left the lens cap of your mind on again.