Get the 3M Striping tape, you will save yourself about a boat dollar ($1,000) at least by not painting it. To do it correctly you would be at about 12-1300 to have somebody paint it for your with a sprayer.
You can buy it since there is a part number in your parts manual. I had my local Detailer do mine while out of the water for a few hundred bucks. He bought a wide roll and cut it down and it looks perfect.