white crystal stuff that seems to show up on some limbs. I've heard you put it in sun light etc. if MOC and it gets rid of it. ... I have a loose B wing pilot that had it show up so I washed it off , it came back after so many years .. washed it off again ... now it seems not to be a big deal but wondering if it will spread to other figures ... I get the feeling it doesn't since it was only on one leg of the B wing pilot and he's standing by other figures and none of them show any signs. just want to make sure I'm protecting my figures. many thanks.