Hi Pucksucker;
From your description, it sounds like your gauges and gear are coming in contact with the cave floor, walls & ceiling.
How are your gauges rigged on your BCD? If you let them dangle away from your body, they will get scuffed on the cave walls and floor.
It is especially important when you are diving in confined spaces, such as caves and wreck interiors, that you streamline your gear as much as possible. This means also that you have no dangling gear (knives, gauges, clips, etc...). You must also become accutely aware of clearance issues for your tanks and regulator.
Another issue that new cave divers sometimes run into is buoyancy control. You must really work at fine tuning your buoyancy control. In most open water senarios a diver may have a "little" bit of play in their buoyancy control and still be highly successful at their dive. In confined space diving your buoyance must be nearly perfect or you risk dragging on the floor or crashing into the walls or ceiling, thus causing gear to get banged around, and even more importantly causing a "silt out".
Even at the best of conditions though, gear is bound to get a little scuffed up every now and then.
Hope this helps
Ron sends