Whoah, thanks for the feedback, I didn't expect anyone to actually be amazed!
Basically I bought an extra labcoat for the sleeves and pockets, then used the pouch and pocket templates from TUBFC.
To dye it, I used RIT dye - 1 pouch Royal Blue, 1 pouch Pearl Grey, and 1/2 pouch black, and dyed it for about an hour.
To weather it, I simply used black and grey spraypaint, just lightling brushing in some spots, and more around the legs and such.
This was a suprisingly easy project for me, I don't do too much sewing but I had no trouble at all. The dying was easy as well, and it turned out very close to the colour I wanted.
Here is a shot of it with my costume on: