If you're looking for a quick fix in terms of filler type products, you'd be looking at glazing, then protecting with a wax of sorts :) Filler heavy glazes (such as AD 'Brilliance') make light work of filling swirls. If you want quick and easy protection, Sonax Brilliant Shine Detailer spray is right up your alley. Spray on, buff in, job done. It protects very well for what is essentially a quick detailer spray, and you absolutely cannot argue with the gloss it gives (on my old Prelude):