HELP! iPhone 4s WiFi IC Removal damaged motherboard?

I wanted to try a different method in removing the iPhone 4s WiFi IC Chip (using an engraving pen). It seems like I have over scrubbed it in certain areas and exposing the copper/ground (none of the pads are damaged)

Have I damaged the board? Is it repairable? (If so, how?) Or is it fine?

(Please see pic)