Back of guitar neck dirty (under the varnish??!!)

[Carl Mustaine]

I have just bought a jackson ps4 off ebay. The guitar needs a bit of cleaning up. The fretboard seems immaculate, but the back of the neck is a different matter. It is varnished (or lacquered?), but it seems to be scruffy and dirty underneath the varnish.:think: The dirt seems to be around the scarf joint

Has anyone seen this before?

And does anyone know how I clean it? or do I need to have the varnish stripped off and then relacquered?

Thanks for any help.

Carl

[Grahf]

Yeah I had an old ibanez like that.. the dirt had like seeped into the neck, if you want it to look brand new again you'll probably need a refinish