I recently cleaned up an inexpensive (Silvertone made by Harmony) banjo (yes, openmike, your ex-axe)- if you know what you're doing, dismantling and reassembly is the preferred method. I wasn't able to find anything that worked on the skin head but I'll try eraser and see how that does it. Lemon oil on the fretboard (and the rest of the neck and peghead) worked great - except mine was actually orange oil. Since this banjo had a bakelite pot and resonator, I just washed it in dishwashing detergent - NOT recommended for a wooden instrument.