It won't mess up your warranty and it's quite easy to take off,just start from the left hand side and slowly lift up.
Ah okay, thank you!
Another quick question - Will it damage the case at all (leave a mark)? And can I just get it off with my hands or will I need a knife?
warm it up with a hair dryer first , this will soften the glue underneath the sticker, making it easier to pull it off by hand
Sanj... Are you on an Arsenal forum??