Had my first go at sanding this morning, fully kitted up to be on the safe side, given that it’s fiberglass.

Very quickly ran into the need for some advice. Anyone have thoughts on the best way to deal with some of the finer details when it comes to sanding? I stared with Phasma’s finger armor, so the two pieces that raised the question were these:


I’ve an exacto knife that I used to clean out the grooves so the detail wouldn’t be lost with the filler primer, but what’s the best way to sand/clean all those nooks and crannies? I’m not to worried about the finger armor (which is why I started my sanding there), but particularly for her helmet I want to make sure I get it right.