Are the fingerprints on it intentional? They honestly look like decent texture design elements on most of it, to the point I had to go looking (the narrow top strip on the left hip piece told me they were fingerprints), so if they were intentional texture, disregard.
If you want to avoid that (and the messy fingers) in the future, a plastic bottle cap and some blue tack/sticky tack/even tape helps a ton. Just adhere the mini to the bottle cap, and you have a way to hold it without risking the paint.