I've worked in the sign/graphics trade for over thirty years and started out as a traditional signwriter using a brush and maulstick. Traditionalists may make the choice of paint but my choice for application to fibreglass would be vinyl (although I have the utmost respect for traditional signpainters). A quality grade vinyl will easily outlast most painted graphics. You've actually got more design flexibility with the print and cut variety of vinyl over paint or the more common cut vinyl. Just know that when talking vinyl there's a huge selection of product out there, everything from custom prints to carbon fibre, metallics, mylar etc. Make sure that whoever is supplying and applying knows their product and what weathers best for your part of the world. As far as price goes...a computer and vinyl cutter/printer is just a tool and just about anybody that can pound a keyboard can sell you cut vinyl graphics. You can always cheap out and go for plain-jane stick on lettering or you can contract a reputable sign shop to work up something original and unique to you and your boat. I've found you usually get what you pay for. On our boat I didn't go paint or vinyl. I cnc engraved teak panels for the transom and port and starboard name boards. I've always thought that how much time, thought and effort that go into a boat's name speaks volumes about the owner, but then again I'm a bit biased! ;-)