One of the major issues in polywell design stumping even that of the good Doctor B, was that of separating the fuel and reaction products and evacuating the later.
This may prove very helpful http://www.csiro.au/news/FantasticPlastic.html
If it can differentiate between CO2 and CH4. It should be able to sort Boron and Helium.
*Thumbs Up* CSIRO
-k
Ion Filtration Advances
Ion Filtration Advances
Purity is Power
Molecular, not atomic, filtering
It's not clear from their description that atomic-level filtering would work.