First, you should de-anonymize your self on the forum for members. We have instructions.
As for the painting question, it depends on how much of the time you plan to keep her in the water. At Quantico, the water is right on the verge between sweet and brackish. You probably won't have much of an issue with barnacles, but if she is in the water all summer she will get green growth. You can brush most of that growth off while she is in the water, but you won't be able to get the keel. It probably does not matter unless you are racing. If you are racing, you can get a sort of gigantic towel that you used to clean her undersides while in the water, but you would probably be better off dry-sailing her.