I have the Porter 7424 which I purchsed for my Audi to buff out minor scuffs. But to be honest, I rarely use it. I have a claybar pad from Griots' but almost always claybar by hand with Griot's claybar. I then follow with high quality Carnauba a year and use detail glaze in between.
Now, here's where it gets a little weird. A few years I picked up a couple of jars of Zymol Ital Estate wax at a deal, I think I paid around $50 for both, or less. Well this stuff is expensive at $385 for a 6oz jar - I had NO idea of this when I purchased it.
https://www.autoanything.com/car-care/69A1526A0A0.aspx But there is even more really high end stuff out there that sells over $1000! A little weird or for people who just have way too much money.
So back to the Ital wax. It has a very high carnauba content and to apply, you first scoop a wad if it into your palm and then let your body heat melt the chips a little. Then using your bare palm, rub it deeping into the paint. I really like this method. After a detail wash and dry, and then a clar bar, the paint is smooth as a baby's butt. The real beauty of hand applying wax is that you can feel even the smallest imperfection as you apply it. So you can flick off tiny tar spots or bug juice etc and correct the finish. My secret to using Carnauba (the real stuff with chips) is to lightly remove it before it dries as it melts down into the finish. Do NOT wait for the wax to dry into a powdery finish because it will never happen with carnauba - the white powder is because some of the lesser waxes contain clay i.e. as a cleaner. Also if you let Carnauba dry to hardness, you will have huge guns trying to get it off of your paint. Remove BEFORE it hardens using long strokes front to rear, not circles or side to side (to minimize swirl and light reflection), then after the first waxing of the entire car, go back and spritz with water and rebuff (again by hand only.) You will be rewarded and the finish will remain for months.
Now, NONE of this applies to my TRs, the finish is just not close to that good and I doubt that Triumphs ever produced a paint job worthy of this wax. For the TRs, I take the same care of the finish but use Griot's carnauba ($20)and apply with a wax pad instead. But the principle applies. SO IMO a polisher has it place in correcting imperfections but to keep a finish looking (and feeling) great, it just takes work ... or devotion.
I have more modern thinking friends that swear by Zaino brothers paint finish - it's not wax, doesn't smell or feel like wax but I must admit it does shine nicely. See it here
https://www.zainostore.com/ It's just not for me. Personally, I like the sensory enrichment of the feel, smells, and the process.