Larry and Denny,
Larry,You have not told us which O'Day you own. I am assuming a 22 or 25.Denny, I would not wave credentials. Your argument has many holes.Larry, If you are doing the work, or if you have it done, You will need to remove all the existing paint to apply the two part epoxy finish that Denny has suggested. The manufactures recommend that it be applied professionally. You are now at $1500 to $2000 to have professionally done. I am assuming this is 1/3 the price of the boat. There is no two part epoxy paint made to be below the waterline, that I know of. Should you sell the boat, the bottom would have to be taken all the way down,removing the two part epoxy,to receive new antifouling paint, unless you sold your lift with the boat. The removal of the epoxy paint and the recoat of antifouling would be about $1500.If you have your hull professionally antifouled you may pay $500 to $1000 at the worst case. This would be sanding the the existing paint to an acceptable surface then applying antifouling paint.Denny, a smooth bottom is not as fast as a slightly textured finish. The friction is greater with a smooth hull than a slightly textured hull. The friction is less "water to water" than "water to hull". The slight imperfections hold/ slows water , which continues to roll aft , and the water is sliding on water. Comparing it to apparent wind; as the boat moves forward, the wind speed increases by the speed of the boat. As the boat passes through the water, the water rolls back from bow to stern, where a smooth finish has full surface friction.Denny, Though you are a marine surveyor, please remember that advice can cost people alot of money. Your job is to make sure a boat is sound. If you survey a boat with antifoul over topside epoxy and say nothing, you would be wrong.In time the epoxy paint would peel taking the antifouling with it. Denny, Please understand this is not a war. I feel this is one area you need to study more. If you are in training, please print this string and take it to your trainer. Ask him for his opinion before you respond back. I have been proven wrong before and loudly admitted it so that someone here would not make a mistake.Best to both of your.w.landau