Now I not only find the printer, but I can correctly send data to it, so
long as it's data the printer can consume like and image and not a raw
pdf. I got an error on my first attempt to print a pdf until I opened
GIMP and imported it that way.
This is cobbled together from several different forum posts and is
likely suboptimal. The avahi support made the system auto-discover the
printer, but it wasn't able to send data to the printer successfully.