I am in the process of buying a 1910 home with most wood trim in good shape, but there are certain areas where the finish appears to have been rubbed off. Is there a way to correct these spots without removing and refinishing ALL the trim? I am attaching a picture that shows the type of wear I am referring to. The thought of removing, sanding, restaining, etc. is daunting, but I don't what to attempt something that will worsen the problem.