How To: The Perfect Blowout By Andy Scully Posted 01.28.2016 Share on Apply OUAI Soft Mousse through wet or dry hair. Spray OUAI Wave Spray all over from root to tip. Section hair and blowdry with a round brush, beveling the ends under. Spray OUAI Soft Hair Spray all over. Flat iron over the pieces around the face for a silky finish.