it boils down to a combo of 'paint correction/protection' and 'maintenance'.
in terms of paint correction, this means preparing the paint before applying the wax/sealant. this usually involves a thorough wash, clay bar to remove stuck-on fall-out, machine polish to remove swirls/scratches. usually, only 'machine polishing' can achieve a top quality result (hand polishing does not generate enough heat/friction).
then, add the protection, whether it be wax (usually not as long-lasting, but can provide a depth and glow unsurpassed) or sealant (synthetic product; usually harder and longer lasting; can be high gloss but not quite as rich looking). a pre-wax product (eg: paint cleanser) is also beneficial.
these are typical steps performed by either the hobbyist or a pro detailer.
then it's a matter of maintenance. which including 'correct' washing/drying technique (eg: 2-bucket wash with microfibre waffle weave cloth), and perhaps finishing with a spray wax detailer and mf cloth. nothing that will induce swirls again.
then intermittent polishing/waxing, say every 3~6 months. a pro detailer can be well worth employing to bring it right up to as-new spec. then it should be quite easy to maintain if you are vigilant and wash the car often (ie: at least every 2 weeks and not every 2 years).
refer to the detailing subforum for more info. but yes, the upkeep is more than most other colours. i have a Kyalami Black GT, which in generally immaculate, but i work hard at that.