Now that I think about it, they also suggested that you just pour it through a paint strainer and the congealed wax will be captured. This allows you to just pour the entire container and waste less shellac. They may have even suggested doing it twice to get any wax that may not have completely congealed in the first pass.
--Nathan, TX. Hire the lazy man. He may not do as much work but that's because he will find a better way.