it isn't sharp at all, even though my roller technique produced smaller more jagged edges. Again, I think this was from trying to apply it when temp was too warm. What's interesting is that the old deck condition would get very hot underfoot, but with the kiwigrip I can walk barefooted and not feel any heat. It was about $100 for a gallon which can do upwards of a 30' boat depending on the area covered. Mine is 27' and I used the entire gallon, but I was covering quite a lot of deck, cabin top and cockpit area. The only prep is to make sure that there are no oils or waxes on the surface to be coated. Any suitable cleaner that will remove those will do. And of course, the taping is the time consuming part, particularly if you do an in water job like I did and are leaving shrouds ands handrails etc in place.
S/V Don't Panic!
“Navigare necesse est, vivere non est necesse” To Sail is vital, to live is not.