Due to the changes to mixology cost, anyone that prepared all their paste in advance will now have an excessive amount of paste, especially Lye paste.
The reasons I think it should be tradable are:
- Adds a new money maker by letting people skip the paste making step for gp
- Lets people who have finished mixology sell off any extra paste they've got and recoup some losses
- It doesn't make sense that the pastes are untradable