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The medium with the spike in it will bite into the underlayers more easily than the Maroger., so you will want to let it dry for a bit longer. I have found that I can usually paint over it again within 2 days with no issues unless I was really scrubbing. Substituting turpentine instead of the spike would make it slightly less volitile, but I wonder about how it might affect the handling properties of the medium. I have only made it with spike thus far.
Maroger is generally touch dry the following day and you can certainly paint over your layers within 24 hours with no real problems.
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