Off road

We have two questions relating to our 2012 Mitsubishi Triton. We have electronic rust protection and have noticed some surface rust appearing. Is this normal or covered with warranty? And we had our clutch fail yesterday and told today it's the slave cylinder and that it's not covered under warranty as sand got in and cause a leak. We still have almost a year on our warranty and I thought driving the car for what it's designed for, would be covered by warranty. We do go up the beach about four times a year. It always gets a thorough wash and clean after use.

I wanted a proper 4WD and bought a 2015 Ford Everest in good faith from Ford. They advertise extensively that the Everest is a fully-fledged 4WD, but it appears that under Australian Design Rules they have had it certified as a passenger car as opposed to an off-road vehicle. This restricts what tyres can be fitted as well as many other modifications that are normal on a 4WD. This is misleading to me as a buyer and unfair to other car manufacturers who market 4WDs.