First thing to do is make sure you use good quality materials, nothing worse than a crappy paint job,wipe the hull with a good dewaxer and change the lint free rags often, then sand with a good quality sandpaper,cheap stuff leaves behind particles of sand, then wipe again again changing the rags often, if you are using a brush (big shivers here) use a good quality one, and follow the directions to the T, if using a sprayer safety first proper breathing for yourself is the most important, same steps as above, mask off areas not being painted (don't use newspapers for this ) use the proper masking paper,the larger areas you can use plastic,and again follow the directions to the T and to tell you the truth this will be and is a big job, if you don't have the proper equipment or the skills to do this find someone who does it will save you a lot of problems, good luck.:-)