Thanks for the reply, its a scuff mark that travels all the way down that side, i have tried the spit and polish no joy.
I got the case from OC.UK i thought it might me best to RMA it with Lian Li as this is not oc,s problem, plus i cant be all that bothered to strip it out and send it back, that sounds lazy of me but you know what its like to put a rig together.
I will send some better pics to Lian Li.