― I have found some great coupons for Sigma Beauty (sigmabeauty.com), which is where I get all of my makeup brushes. If you would like to buy Sigma brushes, please consider using my coupon codes and thru link below. (The coupons are borrowed from Handmade Reviews' Sigma Makeup Coupon page.) ∙ IN2011 - Click through link and use coupon to get 10% off your Sigma order and a free gift with any $30 purchase. (Expires November 30, 2011) ∙ PSW2011 - Click through link and use coupon to get [...].