my sister in law who came from australia told me that whether i want something that she should get for me as it was her first time abroad.she knew i had long wanted a sunscreen that would help in protecting me against the harsh rays of the sun and not take away my natural skin color from me .so she said that she will get me Blue Lizard Sunscreen.i want to know that how is it that Blue Lizard Sunscreen is different and special from the other sunscreens that are available in the market?and what is the quantity of Blue Lizard Sunscreen that i need to apply before i go out under the sun?