In the spirit of Alan's prior post, I feel that had this individual asked, "How do I make a P500 float", I would have provided him/her with a some real options
1. send it in a rocket to the upper stratosphere for satellite, orbit release (Please contact Elon Musk, think he is at the hospital at present thinking up a new baby name with just the alphbet)
2. park it on a Cruise ship (they have room and glad to rent out the dance floor to you) imagine the track you could lay out in one of those things.
3. Buy a pontoon boat and put the Honda sticker on it
4. strap it to your back and paddle 'HARD'
My personal choice would be option 4 to eliminate future stupid questions.