I was thinking the same using one panel as an ''experiment''.
I doubt there will be any big difference, as the paint is so slinky after the Mohs Evo .. the water just fly off.
Why not use engine de-greaser, spray on, leave for 3min and pour a lots of water to remove the oil and other dirt.
If you don't have a blower, simply run the engine for 10min, the engine heat will take care of the residue water.