remover to keep the surface saturated. To facilitate the cleaning process, run a gloved finger over the surface of the coupon to encourage the removal of the corrosion inhibitor. After approximately 30 seconds, wipe coupon with a clean dry cloth or towel and inspect. Clean both sides of the coupon in this manner. Cleaning of the coupon – Immerse the coupon into cleaning solution according to normal phosphating preparation procedures. Proceed with cleaning by scrubbing the surface with a brush for a minimum of 30 seconds per side. Clean both sides of the coupon in this manner.