Quote Originally Posted by Michael Mutmansky

Does it strip off the potassium, or does it need free oxalic acid to form?

Do you know if any of the clearing bath solutions are better at removing this if it forms?

If you are getting a precipitate on your prints, You should try mixing your first clearing bath with distilled water and go directly into it from your developer. Does your clearing bath look milky or clear? (Not colorless but Clear) If you are getting solids in your first clearing bath, you should try an alternative clearing process.