Cleaning a prop is quite easily done with muriatic acid and then polishing. Muriatic acid is very dangerous to work with but the results are spectacular. Read up on safely using the product before you even buy it, as it may change your mind.
We are going to try greasing our prop if we intend to stay in an anchorage for more than a few weeks to see if it helps keep the growth down, but obviously as soon as you use the prop the grease will be gone. So far the new prop paints have been a miserable failure, even when professionally applied.Perhaps they work if you never use the boat.
Over the years I've tried lots of prop and running gear antifoulings with absolutely zero success, including chroming props. Save your money for a periodic diver.