well, display case or not these figures gather dust. It may take a few years but eventually they'll be dusty.
So when cleaning comes...
I use a makeup brush for this, because it's really soft. It doesn't have any problems with minis + the glue-type webs, but the really realistic beutiful ones are destroyed by it. And no, even air-sprays used to clean pc insides for example won't work. The airflow is too strong. If the dust does the web goes too.
I might try AB on low PSI setting next time, but even there I don't expect anything different. If the airflow is slow enough to keep the web intact, it won't be powerful enough to get rid of the dust.
But as I said, it's a thing for the lack/varnish based ones. The one with the glue... I can touch it, push it down a bit and won't get destroyed.