I believe that they hold up just fine. I live in Hawaii, intense UV and moisture at most all times. My McCarty hasn't seen it's case in a decade, it resides out, in the open and available for play. It's still as dark Cherry red sunburst as it was the day I bought it new in Dallas. Never ever had tuning issues, even with the supposed import tuners and she sounds just as great as new. The only thing mine has experienced is Budweiser dings....and very few of those.