No, Pledge Revive It isn't the product. The product many have used as a clear coat was originally called Future, made by SC Johnson.
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Over the years, the product name changed, while the formula remained the same. The last incarnation (I think) was this:
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SC Johnson discontinued it last year. It was not a wood polish product, it was a clear acrylic for vinyl flooring, and linoleum back in the day.
Modelers used it because it was a reasonably-priced alternative to products made my modeling supply companies, and had a number of uses for us modelers, from gloss-coating prior to applying decals, to sealing a color coat before applying weathering media, to dipping clear parts like airplane canopies and windscreens to fill the tiny scratches and make them look clearer.
Gloss-coating is not absolutely necessary, as Momo noted. I do it sometimes for decaling, but not always. So don't feel like you must do it. Of course, you can choose to. Whatever works best for you.