Ok, I need to repaint my 14' jon boat and had a couple questions. How should you prepare it for painting? It has been painted before. Will this work that I found? "recipe from some fishing magazine years ago... worked on my 12' pond boat... still in good shape today: Wash the "to be painted" area with soap and water, be sure the soap (Dawn is what I used) has a "degreaser" agent. After it has dried, wash the area with vinegar (acid) and water." What kind of paint should I buy? Thanks in advance!