Encyclia tampense/tampensis yellow substance?

[FL_Orchid_Collector]

I got an Encyclia tampensis with the oldest leaf yellowed and it fell out of the p-bulb on delivery. It had three leaves, and the middle leaf also has the same yellowing. However, it rubbed off the leaf when I touched it! I haven't used a q-tip or anything to try to get in the crease but there's only two leaves so I don't want to damage it. Does anyone know what this is, is it dangerous, if so what should I do?