I picked up a used Stringray HH-4 a couple weeks ago and love the guitar. The neck was a bit dirty with some minor wear marks that would be expected from a gigged bass. I had already cleaned the fretboard and polished the frets when I first got it, but without any Tru-Oil I opted to just surface clean the neck and leave it the way it was. I went to the range to do some shooting today and brought home a bottle of Tru-Oil...what a difference after some steel wool and a fresh oiling. Cleaner, smoother, and it has that wonderful firearms smell to it now.