Test to see what cleans White Ashy areas on ASEs
I used 'junk' bullion ASEs for the test as they were already junk. Used White's Silver Polish rub. Yikes, Its very aggressive. Tried acetone and coin dip in the past - the acetone didn't remove the ashy spots and the coin dip just kills luster and still see the spots. I did overdo it with the rub. I'll test another with less polish/little rubbing.
So, Maybe not a good result to remove the white spots which are showing up.
A little less beat up looking for junk level. Best to live with spots on better ASE's.