Pick & Clean is Nitty-Gritty's eco-friendly solution for etching and passivating stainless steel. Ideal for those who need to work on parts in situ, Pick & Clean is easy to use. The kit includes Pick tape for removing discoloration and oxides after the welding process, and Clean wipes for neutralizing and protecting the surface. The presented version is also used in the food and medical industries. How to use: apply PICK tape along the weld, making sure it adheres well to the surface. Leave on for at least 10-15 minutes*. Remove PICK tape and eliminate acid residue with CLEAN** neutralizing cloth. Then wipe dry. * The time required for proper etching is affected by the ambient temperature and the quality of the weld seam. ** After etching is completed, close the wipe packs to prevent them from drying out. Shelf life: Unopened product: 2 years. After opening the package: 4 months.