I don't have 84' of anything to deal with, but I can tell you it's a lot of work buffing my 32'er. I got tired of buffing a couple of years ago & went with the wipe on finishes. Took me a few tries to find a good one though. Ended up having to strip a few of them off.
I use some stuff called Shine-Again now, I just hand the bottle to my wife & say shine the boat!... I never break out in a sweat during the whole process!
My 2 cents..... Larry