Thanks, I think I'll have to get into the Max way of doing things, as it seems it's the more common program of choice when it comes to this sort of work. Also by "crease info" I was talking about the way you can define hard edges in smooth preview mode. This also allows you to take your mesh into a program such as Zbrush…
Thanks for your response. I actually became aware of the fact that you have to split the UV shell along the hard edges. I tested this with just the helmet but I still couldn't get the desired result. I then noticed that at some stage I've lost my crease information, likely because objs can't actually hold this information…