I would just sand this down to just above the CF!  Do not go finer than 400 grit wet sand.  No need ....  sand the low spots that are left lightly with 220 or 400 grit ..
Coat the low spots, then leave to cure to a tack, then add a new complete top coat.. You need to work very methodically with the brush, to ensure an even layer
It's just like doing a very careful brush varnish ...

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