In my experience (I'm choosing words carefully) the clear coats are a small % "paint" and a large % propellant and solvent. You may need a few more coats than you originally thought to build an actual layer. A few more coats of clear might be beneficial if you plan to (somewhat) aggressively polish it later.
A final coat that is a bit thicker may help too, instead of having it applied somewhat dull (many thin coats from a decent distance) you may want to do the last one just a little heavier so it has a shine to it. This is tough because you also don't want it to run.
Machine polish may not be needed since it's not a big area. It isn't inherently better it just saves your arms. I think you can still get there by hand.
I haven't touched up a car in a while so consider these only suggestions to think about and not necessarily exactly what you need to do.
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