23 Jun Ouidad Training in NYC Posted at 21:41h in Metropolis Education, Metropolis Fashion Blog by itsDigidal 5 Likes Metropolis is now a Ouidad-Certified Salon! We are so excited to offer the Ouidad Carve and Slice Haircutting Technique at Metropolis Spa Salon. Silva, Tanya, Tammy, Mitra, Pam, Nicole have all been certified!