put 1um paper on top, and a tightly wound polypropylene felt filter below would do the trick reasonably effectively.
be aware that some folks have seen shedding with Polyester felt particulate (tampon tek)
I just double checked compatibility and although I can’t find polyester with butane, it does better than polypropylene with hexane, and polypropylene gets an excellent with butane here: Polypropylene Chemical Compatibility Chart and “Meh” with hexane or heptane.
might as well read the Tricks of the trade from head to toe just for good measure.