Zinc Plate with Blackener
I am plating nuts bolts and mics brackets for my car. I begin with a thorough sandblasting of each part and am then using the SP degreaser at temp and the plating seems to be working well. Good job.
When I go to use the blackener, the manual I recieved with the product says 1part concentrate to 9 parts water and that it will work at room temp if I leave it for ~15-20 minutes. That process results ina a finish which has white almost chaulky looking streaks after teh part has dried. Coating with WD40 makes it look better... until the residual WD40 is wipped off after ~12 hours. Then the finish is un even and can be rubbed off by hand.
I read this morning on the web that the solution is supposed to be 1 part to 4 parts and that a small amount of acid is suposed to be used... and that it should be heated to a minimum of 90 degree and left for ~5-7minutes.
Which is the correct solution? I'm thinking 1 in 4 with acid makes more sense than 1 in 9 at room temp. Please help?
-Chris
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