I've noticed on my P12 that my Jaspers keyboard stand arms have left a shiny mark on the wood. This is removable with a bit of elbow grease. I just wondered why it has happened.
My stand has some shiny soft plastic covers on the tabs at the end of the arms, the bits that stop the synth sliding off the arms when angled. I can only assume that the wood needs to "breathe" a little. Perhaps I should stick some felt between the two?