No, seriously. Products to buff up the gell coat generally don’t last very long, at best a year. And the really good ones are expensive as John pointed out. Perhaps as expensive as good quality two pot paint?
And think of all the work buffing up the hull? Isn’t that just about as much work as sanding her in preparation of a paint job? A good two-pot paint will last many years and not just a few months. Unless there are other things to repair I don’t see why a paint job is harder to do then a good polishing job.
Ask a good friend and a tote of beer to help you and it will be fun.