![]() Of course the coolers blew the WD all over the plant. ![]() I still don't know what caused them and probably never will.Īnother time I had fish-eyes appear suddenly and it took me 2 weeks to finally track down that the day they started was the day that maintenance sprayed WD-40 into the coolers to lube them. They only appeared in one of our paints, so when we run that specific product the painters turn off the A/C and the fish-eyes are no longer a problem. I recently solved a fish-eye problem simply by realizing that they only appeared on the product during the period of time that the air-conditioner cycled on. All you can do when they appear is look for something that is happening that isn't happening when they aren't present, like maintenance doing PM's, or air dryer malfunction. They are caused by an atomized, petroleum or silicon based product. Don't bother looking any where else because it's a waste of time. Fish eyes are an air-line or airborne contaminate. I have come to the theory that it must be an air borne contaminant from a nearby factory (since we are surrounded with factories). Even my paint supplier spends endless hours trying to assist me with the problem. The problem is not part specific but is sometimes paint specific. Nothing has changed, no additional processes or chemicals but the fisheyes come and go. My process is consistent with each part produced. I have tried cleaning with Naptha, acetone Acetone, MEK / methyl ethyl ketone, etc but with no resolve. ![]() I am in a Class 100 Clean Room and go to great lengths to make sure my parts are cleaned before they enter into the Clean Room. After some time chasing the problem mysteriously disappears. I have tried many ideas to narrow down the contaminant but always fail. I Manufacture/Finish parts and frequently encounter Fish Eyes on products. The edges of the photo look compressed.Plating, anodizing, & finishing Q&As since 1989
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