wrote

I have
sanded plenty of fiberglass,
; it got
into everything and made me itch. A cold shower gets most of it off,
while a warm shower can open the pores and let it in so it can bug you
for a few more days.

Another good clue for all you plastic airplane guys, is to spray your skin
with hairspray before, and after you sand. When you get in the cool shower,
it will wash off much better. It clogs the pores, so it does not go down
into the pores, then the after spray clumps the fibers together, so they
stay together, and wash off without going into your pores. Spray deodorant
works, too.

Try it! It really works!
--
Jim in NC