Got a chance myself to varnish some Innova matt papers now. Think it was IFA-12,13,14, with BC Glamour II Gloss. Didn't go well, see attachments. Will do more tests on BC's own matt papers soon. One with heavy ink coverage / black background smeared a lot of ink all over. Using media settings as recommended by Innova (here it's heavyweight fine art paper, standard ink usage).
Also tried Glamour II Gloss on the last BC Lyve target print I did. Gone better. The one on custom media base MBK (not MBK,PBK), that smeared somewhat already when dry. It actually didn't smear more when coated/varnished this time. Whether that was caused by the MBK-only base media and/or Glamour II (vs Timeless) is yet to be known. The varnish spreads out well, and the leveling agent in the Glamour II is nice to work with, I think. Rolling it on with high density foam rollers.
To be clear, the prints all had 15+ hours of drying/outgassing before varnishing. And images here are taken after varnish has dried up as much as it can.