What is a safe way to clean the finish? Its covered in gunk from being poorly stored for years. There is finger gunk on the fretboard, what can I do to clean this off? I'm going to hit it with some danish oil but I want to get the gunk off first. Are the tuners safe to use? I've had a Kluson crumble on me before so I'm always nervous about using plastic buttoned tuners. The last thing I want to do is have them crumble. If they are safe to use what is a good lubricant to use on them? They are not smooth turning at all.