The Foleo used the soft-touch paint on its surface that Palm also used on their Treo 755p phone. Unfortunately, this paint has the tendency to get very tacky and unpleasant to handle after years in storage, and all of my devices are suffering from that to different degrees.
Fortunately, this was only the exterior, so the inside with the keyboard and screen is still fine.
The best treatment I've found so far is to rub the surface with a mixture of water and baking soda. That seems to remove much of the sticky paint, leaving it much more usable. (Thanks to Dimity Grinberg for the formula)
Here a picture of one of my device's exterior that I've not treated. The They Might Be Giants sticker was one I had on my personal development DVT device to tell it apart from other models. It's been in a styrofoam box, so you see where the residue has pulled off some of the pellets.