Sorry guys I do not agree at all.
I had to look it up because this process did not look all too strange to me although I have never done it myself. As I do not have grapes to work with.
This way of winemaking is called extended post fermentation maceration.
What you try to achieve by this is to extract more color, flavor and tannin out of the skins.
This is used sometimes by professional commercial winemakers with certain grape varieties.
The point is that some components in the skins will dissolve in water and others will only dissolve in alcohol. So dissolving in water can be done by cold maceration, in alcohol by this method called post fermentation maceration.
The point is that it is difficult to know when to stop this process. It can be anything between 1 day and a month (or even more).
The alcohol and sulphite will protect the wine from spoiling.
But you do need to have some expertise in knowing when enough components have been extracted. And that is something a beginner is not likely to know.
Tasting is the obvious method, then again a beginner might be confused when tasting a young wine.
Anyone want to read more about this process take Daniel Pambianchi's book Techniques in Home winemaking page 178 and up.
In this particular case I think sound advise is given.
Rack the wine and transfer to secondary. I have no expertise on muscadine wines, but I do expect the limit on extraction has been reached.
Luc