Originally posted by Musclewizard
Can you use Quicksilver Second Face to, reflexively, change into other Forms that are normally handled via Simple Type Charms such as Hybrid Body Transformation or Deadly Beastman Transformation? Edit: It seems this part got answered by Vance on the Exalted Discord. Quicksilver Second Face only applies to "standard" shapeshifting. Still unsure about the second part below though.
What about Many-Faced Moon Transformation? That one is not a charm that transforms one into a specific shape.
It can only be used with the innate Lunar "turn into animals or other humans" shapeshifting. It's not compatible with anything else.