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Old 07-21-2018, 12:35 PM   #5 (permalink)
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tried it and found

Hucho says that a porous surface cannot support airflow.If there's any difference in pressure across the structure,the air will just pass though it.
The little voice in my head suggests that the brushes would frustrate mixing,and 'could' provide some benefit,but science would ask us to test it,and go with the 'evidence.'
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