1 0 0Story related and cannot be missedTaken from the wiki: *** Spoiler - click to reveal ***When you meet up to Wheatley you may notice a small white area to his left. Fire a portal at that area. You will soon see white gel pouring from the ceiling. When it lands, fire an alternate portal and wait for white paint to splash on you. At your feet, fire the same portal you used on the white gel.