I need some advice. My boat yard recently painted the bottom on my Hunter 45-1986. The old bottom paint was copperepoxy which was very unsatisfactory and we covered it with Petit Ultima SR. Instructions from both the paint mfgs (copperepoxy and Pettit) indicated that all you need do is rough up (80 grit sand paper) the old copper epoxy and then apply the Petti. My boat yard billed me $4,000 for this work. I''m disputing this bill. They claim it was necessary to build a plastic tent around the boat. $1600. and that they applied five gallons of Pettit. $1000. plus labor at $60.00 per hr. Anyone have any idea what this work should cost?