I also had some liquid on my garage floor at the level of the driver's front wheel, I assumed that it was water (it had no obvious color aside from having mixed with the winter's worth of dirt on the floor), and it has not occurred consistently.
However, I did notice a bright orange powder in the driver's fog light assembly after having the car pressure washed (touchless automatic) for the first time. I'll try to get a picture if I can. Not sure what it is...
I did not taste it, but can send anyone interested a sample for "dégustation" :biggrin: