Hey guys, just picked up a Washburn XB125 for a steal, but the catch was it was in less than mint condition,

. Anyways most of the problems were taken care of( new strings, polish, blah blah) when it got home but there's one thing that's still bothering me: during set-up I noticed that thethe intonation screw for the B string is coverd in rust. My question is: is this going to be a problem at some point in time, and if it is, is it possible for me to replace the screw myself or should I get it professionaly done?
Thanks in advance guys.