This may be slightly OT now, but I wanted to correct something from this thread. Yes, it is possible to sand Kevlar. You have to sand it wet, not dry. You have to use fresh sharp sandpaper, not too coarse. But it is a task better avoided.
Kevlar (DuPont trademark Aramid fibers) in tension is basically as good as S-glass (the Structural glass, which is quite a bit better than the usual E-glass, E standing for Electrical). But under compression is it not worth much. It is good at dampening vibration, and good at keeping the pieces relatively together when a composite structure shatters.
The former is useful to help prevent excessive energy from accumulating in vibration modes to the point where the composite structure fails. Carbon fiber structures can retain energy up towards 96%, by memory. Kevlar structures are closer to 60%, again by memory. Kevlar absorbs vibrational energy very well. In other words, it makes a lousy bell or spring.
The latter is useful for safety when such structures are around fragile humans or other easily damaged valuables and might fail. A car body for instance, if made from just carbon fiber composites, can make razor sharp shards and edges when it fails in an accident. A Kevlar layer (or other Aramid) helps keep the parts together better - still broken, but together. That's a bit safer.
Kevlar is also not ideal for long term moisture exposure, or UV exposure. And people consider Kevlar flame resistant - but really that's in terms of comparison to Polyester fabrics for instance. It can take a bit more heat than most thermoplastics. The continuous max service temperature is somewhere around 350C for Kevlar. Just an example for some info on fabrics and service temp:
https://www.mcallistermills.com/resources/everything-you-need-know-about-high-temperature-fabrics
If you don't really need any of Kevlar's good properties, or need to avoid its weaknesses, it is generally better to avoid Kevlar.
https://jpscm.com/wp-content/uploads/2021/03/Reinforcement-Glass-Fabrics.jpg
BTW, the dust given off from sanding Kevlar should not be breathed in. It can lead to Fibrosis. That's another reason to wet sand Kevlar, rather than dry sand.
Gerald