I've been killing loadz of people on Crysis 3 MP and I was wondering how to earn the Crysis MP Cell Skin on weapons...ive maxed out my Typhoon and there wasn't a skin but is there like a skin for the Gauss Rifle and Predator Bow and how to I earn it, please...

The first reboot gives you cell skins but it doesnt have typhoon skin. The other reboots gives you dogtags.

Is there a skin for the Predator Bow?

You get the CELL skins for the following:
Hammer
Scarab
Scar
Feline
Gauss sabot gun
Takedown
Alpha Jackal
DSG-1 (I think)

As for the bow. You only get a skin for it with the hunter edition. If you have the brawler pack pre-order bonus then you get an exclusive 'American flag' feline skin. If you have the Stalker pack pre-order bonus then you get a special 'White and yellow-ish' skin fro the jackal. If you had the overkill pack then you get no skin. Each pack allows day one access to its designated weapon. Hope this helps. If anyone knows that I may have gotten something wrong, please by all means correct me.