Can both be fitted to the transom or do they need to be in the bows?
I've used this company for boat names:
https://www.funkymonkeyboatnames.co....tube-lettering
The lettering has stayed on but I'm not convinced it's hugely durable. Frankly, the best solution is a a white acrylic pen and some good quality gaffer tape. Costs pennies, will last months at a time and takes minutes to replace. I'd even contemplated gluing on a neat patch and writing on that, just redoing it each time it wore off.