Acid copper
I have a 15 gallon set up and I have been plating steel with small pin holes as well as scratches . I had "expectations" of filling in the pits and scratches , but soon realized that I must remove the material around the pits and scratches to make them disappear after platting. If I plate for 2 hours and get 0.002" the pits are filled in 0.002" too. Then you must remove the material around and hopefully it will be gone. Or you can fill in the pits with solder then plate. I hope this helps.
I have a question for you. What power supply are you using and do you need to use a resistor to get the unit to start?
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