White spots on nickel plated parts. If you are, is this wetting agent recommended for air agitation Did you contact the vendor who supplied the bath chemistry? 06.07.2018 Malazilkree 9 Comments Hope I was able to help. Here I raised my request a few month back regarding white patches. Stains on parts can be prevented with good rinses and adequate drying. Generally, EN coatings do not stain in alkaline environments. Too little primary brightener causes white patches. One or more layers of nickel is also used on motorcycles and bicycles, and on hardware such as hand tools. The white patch means white wash or stain or chrome burn? I think problem is generated from semi bright. Please help me to sort out this problem and to know about it? From beautiful Pine Beach New Jersey: Pitting and fine roughness are easily confused unless viewed under magnification from several angles.