Considering purchasing an older 17 foot skiff. The boat is sound and has a fiberglass hull that is in good shape but it is green and very faded. I am getting the boat for shallow water and rock pile fishing so I am planning on banging it around a bit. But I can't own anything thing that does not look presentable so over the winter I would probably paint this boat. I don't have access to a spray booth and don't want to pay to have it sprayed since this is really a "Beater" so my question is, can I sand down what is on there now and use a paint that I can brush over the existing gel coat?