I believe the problem is in the material itself.
The more I sand the more I reveal.
So some might go away from being filled with ca.
But then more show up.
A dog chasing its tail.
I've got it a lot better now but at a slight angle you can see it.
Yep. I ran into the same problem finishing carbon fiber. The carbon strands themselves will tear out when hand sanding up to finer grit, or maybe they just become more apparent, I think most people's solution is just to leave it at around 400, but it doesn't really pop like that. In industry though when they want a fine finish with it, they use a "coating epoxy" and multiple coats (similar to coating with CA glue multiple times) and then re-sand and buff.
When it comes to this micarta, and I'm assuming you're using the stuff Texas Knife is selling as "Barbed Wire" recently, or masecraft sold as "burlap micarta, even though it's very different than the barbed wire from a few years back (the old stuff is much better quality and consistency), I think this is a by-product of lesser quality processes. The really good stuff, like the old westinghouse and other domestic product, was heated and pressed under high tonnage, to remove any void and get a very dense homogeneous product, where the lesser quality, even industrially produced (which this stuff is), must be lacking adequate pressing or heating or something.
It's still better than any homemade stuff, but it's nothing like the quality of the first barbed wire micarta.
Lots of the carbon fiber is cured in an autoclave or vacuum bagged, but I don't think most of it is pressed or heated to remove all the voids either. Although some of the higher end LVA/Low Void stuff, is much better. Unfortunately I can't seem to find some of the cooler products made like this. So I've pretty much stopped using it.
