Stickers should last for a LONG time frankly. If sail numbers, insignias etc are nothing more than a stick on, why would advertising not last as long? I have stick on lettering on my dumptruck that is 15 yrs old, and was warrenteed to not lose color etc for 7 or 8 yrs.......granted after 15+ yrs, it is a bit faded, and some edges are finally falling off, a weekend, put on properly should not be an issue.
She drives me boat,
I drives me dinghy!