Excellent Pen Rob.
Beautiful Blank, Expertly Turned, Fitted and Finished.
A close look at your Photograph, shows several little Dust Particles.
The Acrylic / Poly Resin etc is prone to creating a Static Electric Charge, that will attract and retain dust particles, that an ordinary cloth or paper Towel will only move them from one position to another.
I find that Clothes Tumbler Dryer Sheets, are excellent, (I steal them from SWMBO). I just give the pen a wipe, after I have completed the Pen assembly and the dust particles are retained on the Sheet.
Congratulations,
Brian.