64 hours, coatings started to turn black, think we've reached maximum result.
Water rinse.
View attachment 41183
After polishing on buffer wheel with finest compound
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View attachment 41185
Copper failed during buffing, majority came off.
US nickel did well, very dark brown. Adhered well, ploished OK.
Zinc, did OK, the bolt is dull grey but can't tell how well it plated.
Brass is the winner here, nice bright finish after buffing, plating adhered well.
I think this can be used for some nice accent effects. The simple green process definately works. Pics don't show it, but it plated down into the cap screw recess very well, electrolysis does not get into cavities well.
I'm calling the Zep and generic laundry soap a success as well, since straight copper failed during both tests, zinc worked better with Zep. Zep worked faster and I saw bubbling on the steel during the test that was not present with simple green. Maybe Zep is a more aggressive mix of whatever allows this to work.