As I'm sure it is apparent, it is easy to end up with swirls in non-metallic black paint. Dirt in any material (cloths, etc.) that you rub on the car will scratch the paint. NEVER drop the sponge, drying towel, etc. on the ground then pick it up and continue using it. Swirling is very common after automatic non-touch-free car washes. I would definitely avoid automatic non-touch-free washes. Additionally, I avoid all automatic car washes - even the touch free ones use abrasive solvents that can damage the paint. It's probably overkill to avoid all automatic washes, but better safe than sorry.
Best thing to do is wash it yourself. I use a microfiber sponge and wash the sponge thoroughly after each car wash session. I use regular towels to fry the car (but with black raven, you might want to use microfiber). I wash the car every week (weather permitting in winter months - more like anytime it gets close to 40). I also try to wax the car with a synthetic wax (I prefer NuFinish - no good reason, it's just what I use) at least once a month. It is much easier to keep the paint looking nice than trying to make it look nice after it has already seen years of abuse. Also, if you park the car in bright sunlight (i.e., not in a garage, you live in the south, etc.), you may want to wax as frequently as every other week to help protect from the sun. Make sure you aren't using something too abrasive when you wax frequently, just something to protect the paint and maintain shine. Black cars are a pain to maintain, but when you do, they look great.