Welcome to the forum! I too recently picked up a 2018 Mazda6 GTR and also recently got into the detailing world of polishing and paint correction just a few months ago. It's addicting but our 16 Mustang is Race Red and the swirl marks were driving me crazy. I also had to polish the Mazda6 on delivery because of what I thought was sap on the hood - I bet it came from that plastic wrap that was on the hood to protect it during travel. I never thought of that.
So what are your go to tools for your detailing? We started out with an Adam's Swirl Killer random orbital polisher, Hexlogic polishing pads (from Chemical Guys I believe) with Meguiars Ultimate Polish. We were very happy with the results. Took about 8 hours for a full hand wash (2 bucket method), clay bar, and polish.
Welcome to both worlds! Sounds like you're already versed in cars, so detailing will be a different skill set indeed!
Having owned a boutique detailing business (side business, not primary source of income) the past 10 years or so, i've acquired a lot of products and equipment. Some of the tried and true equipment has been tested over my lifetime as a detailer.
Heck, back in '95 when I started apprenticing under a local legend, the tried and true towel of choice was having a hook-up with the cloth diaper companies and getting their cast-off towels. Those had been washed and sanitized so many times that they were also as soft as a babies bottom... Then microfiber came out, BOOM! A new world opened up.
I still use the tried and tru Porter Cable 7424XP that now has at least a thousand hours of run time on it, while you have the newer Rupes-style Adams orbital. That throw you have (21 mm) is HUGE! can definitely make a flat-panel correct in half the time. But you will have to be super careful of the edges of the pad hitting painted surfaces. The backing plat on pads (the loop side of Velcro) is very rigid laterally, so when you're using that orbital, the Velcro is essentially a cutting blade as it spins. If you aren't careful and the side of the pad makes contact with a painted surface, it is sure to very quickly cut through paint and primer!
Clay bar: Same thing as the baby diapers, clay bar has been the standard for decades. But these new "clay bar towels" they have now are insane. Especially if you have clear bra or decals on a car. Clay bar would push under them, lift them or destroy them. The new towels don't. Using a traditional clay bar would have taken me about 60 minutes to prep the M6 GTR when doing the prep last weekend. Instead with the clay bar towel I had the entire car clay bar step done within 30 minutes, and that was while talking to the neighbor who drove home his Porsche GT3 from the track. You can't beat cutting your detail time down by 50% in a single process!
Paint correction polishes: Have seen a thousand of these things come and go, or updated. My first "miracle polish" was 3M Finess It III. It was superb for paints of it's day, and you could easily change it's cut and gloss characteristics through different pad choices. Now i've stopped buying new chemicals to try out the "new great thing" as, IMHO, you can't beat the Menzerna line of polishes. They are a serious player in paint correction polish and the quality of each and every bottle of product is unmatched. That they also supply German OEM's gives them a scale of production which is unmatched, even by Mothers. Their "Power Finish" (now called "MC2500") is ridiculously easy to apply, work time is superb, and it comes off with 1/10th the effort of most 3M or Mothers products. It's a serious compound for the beginner who can change it's cut through pad choices.
Pads: Still on Lakes Country pads. They hit the quality vs. cost mark where I need them to be. Reliable and durable!
Waxes/sealant: I used Wolfgang Deep Gloss Sealant v3.0 on the Mazda. It has gloss and shine like you wouldn't believe! Protection is a meaty 4-6 months with excellent hydrophobic properties and strong UV protection. Super easy to apply and even easier to remove once cured. However, it must be kept dry for 24 hours after application as humidity at that time prevents the product from curing properly. Very difficult to find the perfect weekend to use this in the Pacific Northwest winters.
Summer details I will use Fuzion estate wax which is an amazing blend of natural carnauba and sealant. 3 coats of this at the start of summer and you've got something which will out-shine all the other cars at your events!