Digital BW, The Print

This is a simplified version of a question I asked earlier.

I recently bought a 2200 and I'm enjoying its ability
to print on a wide variety of media.  So far I've printed
on brown paper (bag) paper, artist's watercolor paper
(Canson 140# cold press), and gesso'd canvas.   Last
night I printed on a brown, toothed paper I use for pastels
and then applied pastels afterwards.  It looked really nice
and I think my figure photography done using this
technique might be salable.

THE QUESTION:  some people on another forum
(Photo.Net) have warned that printing on oddball media
might damage the print heads.  They offered no basis for
ecxpet speculation.   I did extensive Google searches
on phrases like "print head damage", "damage your
print heads", etc, etc, and the only hits I got had to
do with using 3rd-party inks - nothing about the media.

How do I assess the risks of damaging my print heads
using oddball media?