Guitar Stand Help

I have a Stagecraft floor stand; the kind where the guitar rests only on its body.  I just realized that I sometimes leave my S6 on there for days at a time when I'm "stereo aging" it.  I've had that stand for years and used to leave my Cole Clark on it too and before that my Seagull Artist Mosaic folk.  It's got the black foam.  The back body rest part is actually starting to wear pretty thin.  It has never left a mark on any of my guitars or done anything to the finishes, which have all been the matte finishes.

So, the black foam stuff seems to be safe as far as I've experienced so far.