Although I haven't ventured into painting the name on my boat - yet, I've also been advised of the critically important step of thoroughly cleaning the hull. I've been told, aside from your potential need to remove old
paint, to clean the entire area with acetone, and then thoroughly rinse and air dry the area before you start. I understand acetone will not affect existing
paint. I checked and found a quart for about $11 (US) at West Marine.