"Yes, ideally the coating would be clear, and it would be more or less permanent. In other words, it shouldn't just rub off..."
Shandara tries to think of something like that as she reaches for a honeybun, stops, removes her teacup from its saucer, and then breaks the bun about in half.
Spoiler: roll
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craft: alchemy (1d20+9)[22]
Maybe she had an idea or two. She glances at Xavier briefly, but from her experience he didn't seem to be the type who ever took offered food or drink. Understandably, it was a precaution in case there was something in them.