I have an RG2550Z where the frets become "gritty" after a few months or less, at least with no use. They look a little tarnished, and bending feels like it's on fine grit sandpaper. Not sure it can be seen in the photo, maybe in full size:
Is poor quality fretwire common in Prestige line guitars? The guitar is stored in its case, in the house, little humidity, not near the sea, wasn't exposed to the elements. I have another guitar, non-Ibanez, much cheaper, and no fret problems under the exact same conditions.
When I first bought the RG the frets felt similarly bad. I thought it was just bad storage in the store or during import, and asked the store to take care of it. They treated the frets, and it felt good. A few months later, during which I haven't used the guitar, same problem.
It seems even some of the screws on the guitar are of poor quality. See the ones covered in white, as opposed to the still-black ones:
Even the nut screws look a bit fishy (light in photo isn't good):