Question About Rubber Jeep Tires

My son and I are detailing a GI Joe-size (1:6th scale) WWII jeep, including mounting a DID .50 cal on a resin M-31 mount. The rubber (or rubber-like vinyl) tires are much too shiny. Does anyone know a way to remove the shine from the tires before applying dirt and dust, or would the dust take the shine down by itself? I thought maybe soaking them in some kind of solution would do that, but not sure what to use and I don’t want to destroy them by accident.

Rub them down well with steel wool and it should take care of them.