OK - I tried the Elixir product on a white section of my aft deckhouse. Fairly chalky surface prior to the test. I cleaned the area with soap & water
as suggested by Island Girl. Wiped on the Elixir with a paper towel, let it dry then buffed it with a rag (by hand).
I do see that the chalky appearance is gone. However, the surface is still rather dull. Island Girl folks recommended I apply their mirror glaze hard wax over the area to get the shine I'm looking for.
So I'm still not certain about the product, other than I can see a difference in appearance. I also note that the Elixir product was / is originally intended for dark colored surfaces vice white. Guess this was a non-conclusive (and very un-scientific) test.
But hey - the price
was right for that free sample!!