If you have an air compressor, 1-HP or larger (3-cfm at 60-psi), this little jewel will do a pretty good job of cleaning road grime, grease, or brake fluid spills. I like to use Mr. Clean floor cleaner in water, 2-ounces per gallon in a plastic jug, good for about 20 minutes of pressure blasting and cheap all around.

I have used this tool to clean grimy engines and gearboxes, clean up brake fluid spills, and clean the car underbody prior to painting.