My Tyros2 had worn off paint and worn buttons after the first year. My Tyros3 hasn't experienced this yet. I thought Yamaha may have improved in these areas because I remember the complaints from several Tyros2 users. Maybe not.............
I do know this............ My hands are eternally dry (I'm a mechanic) and whenever I played in front of others I always applied hand lotion to make them look better. I had several earlier keyboards, Yamahas and Korgs, that had their paint disappearing. I know it was the lotion!! -charley