As we all know, Waxc isnt the best thing to put on our hulls..makes the hull stick to the water...so I ve been using Sailkote for some time ....I am a sailor (RC and "real") and sailkote works nice....
http://www.888teammclube.com/frames/sailkote/index.html
http://www.mclube.com/frames/sailkote/tips.html
heres a link...on my rc sailing boats, I ve tested it many times....and its NOT making them slower!!! as for making them faster....well difficult to tell....I dont have ythe exact same boat....but on my electric, I feel like its a "littl" bit faster in the straight.
Again thanks
Wis