The process I linked to said a 15 minute run was good. Another source mentioned a long run tended to get "feathers" on the part from excess zinc that just comes off in the rinse and polish. The parts get a soft grey color as the zinc deposits on them. Areas that are shadowed (not visible to the anodes) tend not to get that nice grey color, but are darker. Then a rinse and scrubbing with a brass brush gets them nice and shiny. A second 15 minute run gets a good layer of zinc on them before a final rinse and scrub.
I haven't turned in to that mad scientist yet, but give me time. LOL
For Carl: Here's a photo of an original hood support next to the one I zinc plated. Notice the original plating right around the rivet of the one in the foreground versus the bare de-rusted steel to the right. Not much difference in appearance from the new zinc.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.