I assume you are talking about one of the pre-assembled models. The only way you will be able to get that logo off is to sand the entire face of the headstock down. As for finish, I am gonna have to assume it is polyurethane of some sort. It could be tinted, it might have a stain on the wood of the neck. Either way, you will have a heck of a time trying to match it to the rest of the finish.

In short, I wouldn't bother. Maybe consider a kit you can start from scratch and put your decal on that.