one thing I noticed after the return from the tropics is that my very expensive linear polyurethane {sprayed on professionally} blue paint job was all blistered on one side.also spend the 30 bucks at wal-mart and get a black and decker hand held grinder.you will use this for many other projects on the boat and rigging too.my own preference now,is to roll or brush plain ole'marine enamil.its easier to work with and repair---and it hurts alot less whenya' hit the dock. yes,in time it will happen.