I have all of these polishes except for 3M FI II RC but have used other 3m products, all of which have not be bothered with a little spray of water.
If you are concerned you can used QD and give it a try, if it works for you then great, if not try something else. The
Meguiars products have more polishing oils so they can be worked longer so maybe water is not nessesary.