What about sand and dirt? I have a lot of dirt on top of my engine due to the little bit of muddin done after a rain storm. Rains about 3 times a year where the road around base get's good and muddy. Is it ok to use a garden hose with no pressure to rinse off the engine, and then just give it time to dry? Seeing some rust on pulley bolts, but figure a wire brush, or a greenie meanie can take care of that.