Greetings,  how would i go about fixing a problem like this?  Its not just surface,  its a mm or 2 in depth. 

Also, is this considered "bad" wear?
Cheers, Andy.

I guess any wear through paint is not good.

As far as fixing it goes, there are plenty of guys here which are experts in that field.  I guess one option is to make a decal and place some mylar over the top.  Given its in front of the sling the mylar would hide this.  Any repair (ie paint) would have to be cleared otherwise as it is such a high wear area.