Hi, I purchased a second hand Gibson Les Paul standard, I noticed a few weeks later that a few of the trapezoid inlays had started to pop out. On further examination of the guitar the fretboard was drenched in lemon oil, I managed to prise one of the most badly damaged inlays out of the fretboard to replace it ( I had no choice) and noticed that the glue holding the inlays was yellowed and the glue had parted company with the inlay. I blamed this damage on over use of lemon oil so there is no way I am ever going to use it on any of my guitars. Am I right ?.