Hi, @mackenzie-smith! I recently toured the paleobotany collections here at the KU Natural History Museum. Do you know Rudy Serbet? He showed me lots of sample of permineralized wood (as well as fern impressions) from the Pennsylvanian of Kansas.
Slightly unrelated, but still interesting: Rudy mentioned an acid peel technique on coal balls as a method that paleobotanists use to better image the plants preserved inside the coal ball. Have you ever done this technique?