I have a Gibson SG Standard that I've had for about 8 years. The trapezoid inlay in the third fret is starting to protrude from the fretboard. I felt it when I fretted a note on the third fret one day. What are the steps to making the inlay level with the fretboard again? Should I even attempt this myself or should I take it to a repair shop and let a professional handle it? Or, even better, does Gibson have some type of guarantee where they'll fix it for free?
After 8 years you will not find any manufacturer guarantee, so getting a free repair for inlay damage is not going to happen.
If you are not 100% confident, take it to a luthier, but this is actually a straightforward repair.