Super fine steel wool, single pad
Works wonders on frets and raw necks (rosewood).
Lightly scrub the dry pad on the neck and frets.
NOTE: not to be used on finished necks, for example: maple necks. Strings By Mail holds no responsibility for damage from customer usage if used improperly.
See this before and after done right here at Strings By Mail on a Gibson SG with rosewood neck...