This mod can help low budget eyepieces recover from some of it's flaws.
32mm plossl and 0.6mm thick nylon flock

Removal of the chrome barrel reveals a 2cm width of smooth metal surface inbetween

Cutting the flock into 3 strips would be easier to work with.
When I unroll a whole 9cm strip in a diagonal barrel previously, part of it clump together.

completed surface feels fuzzy and absorbs light

rotated angle for before/after comparison
