This might seem off hand but perhaps it might do the trick;
Prior to the final winterization bring the ethanol and compound to a rolling boil for ten minutes or so. During the boil add several pinches of aluminum oxide or other inert dust. Then cool and winterize. You may discover that some of that stuff will swell and precipitate out much better prior to winterization when boiled in an alcohol and dust of any kind will give perch for the sediment to grab onto when the temperature swings into cryogenic. Then it cannot slip past the filters.
2 Likes