White Deposit on Bonnet Hood - 2011 Corolla

#1
My Toyota corolla 2011 has an accumulation of white deposit (chemical looking precipitate) on the bonnet hood. I was advised to wash this off. However, after two engine washes, the deposit keeps re-accumulating. Any helpful ideas will be appreciated
 
#4
that deposit is white grease, wont damage anything but do wipe it to keep clean, it is to keep the seal from cracking or getting brittle.
 
#6
It sounds similar to what I was having happen and at one point I started to see hints of pink/red in it, which pointed me to the water pump. My water pump was leaking and had to be replaced.
 
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