What's the best method for smoothing down touch up paint?

I tried rubbing out the paint touch up with Meguiar's "Mirror Glaze (1) Professional Medium-Cut Cleaner", rated at "7" on the "Light Cut - Heavy Cut" scale. I was told that it is more abrasive than the Meguiar's "Clear Coat Safe Polishing Compound". (Counter-intuitively, the heavier cleaner is thinner. Hmm!)

I wrapped a rubber eraser in soaked 2000 grit wet-dry sandpaper and lightly sanded down the higher (thicker) areas of the touch up paint spot. Then I put some "Mirror Glaze" cleaner in a terry cloth rag and started to rub moderately with a circular motion (this stuff is intended for use with a buffer). Eek! Instantly the paint turned almost black. WTH!? What is going wrong? I expected the exact opposite reaction: I expected to see the Silky Silver start to look more like the surrounding paint. Instead, it looks like the cleaner cleaned the paint OFF. The black bumper beneath was starting to "surface".

Damn! So, I put more touch up paint on the aggrieved area and now I wait. It's been c. 24 hours (I had waited c. that long before). I guess this needs at least 48 hours, like I originally intended.

The same thing happened on the tiny LR mark on the acute edge of the "spoiler" (where I accidentally rubbed while attending to an actual scratch further in and below the edge). My touch up paint spot turned dark and I had to add more paint.

I guess that I can keep doing this over and over until it comes out right. It did, once already. But each subsequent attempt on these other two spots have ended in failure.
 
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More on this: Yesterday, after 48+ hours of drying, I took the Meguiar's "clear coat safe" stuff to one of the touch ups (on the edge of the "spoiler"). Gah! Total crap result. It turned into a dark grey spot. WTH!? I thought that this stuff worked on bare paint. I guess NOT! On the spot near the right headlight I went back to my method of my one success last week: sanding lightly with 2000 grit and plenty of water. No good. No blend. No Joy.

At this point, I have no idea why my one success occurred. Maybe I was being given a "gift", heh! I'm not complaining, because that one area was glaringly bad, easily business card size, maybe bigger; white scratches in the Silky Silver; it rankled and fretted me something awful. When the scratches literally vanished under my nose as I was going around and around with the sandpaper under the edge of my thumb, I was flabbergasted. That hasn't happened again. I don't know what the differences are, what I am doing wrong.

One thing I suspect about the buffing compounds: they do not work to smooth out bare touch up paint, at least not the paint from Kia. The touch ups never seem to go hard. You can always stick your thumb nail into them and leave a little dent. When you brush your finger tip across the touch up it "drags" a bit. And the buffing compounds instantly pick up metallic silver in the cloth, while turning the touch ups almost black.

Where do I go from here? Just put paint on as thinly as possible and put a clear coat on and leave well enough alone? That hardly seems adequate to one who wants "invisible repairs" as the end result. ...
 
I stopped by Magic Clean to satisfy myself that the scratches on my LR fender (that started all of this OC(D) touch up nonsense) had not been caused by their system. The gal said that the whirling cloth "spankers" are very, very soft. And even if something abrasive got in there it would mark up more than one car in the same place. They have had zero complaints. The hand cloths that the outside guys use to finish the wipe down are only used once: on my car, then tossed into the laundry. Each car gets a fresh set of wipe down cloths. Cool! I can return with complete confidence. So what caused the scuff? When I was parked somewhere, some kid bounced a ball off my fender, or some similar stupidity. Anyway, it isn't likely to occur again. "It" isn't, but something else will, sooner or later.

The gal sent me to Gerardo on 40th West. I pass his body and paint shop every week going to and coming from church. He listened to my saga with professional interest, looked at the mark beside the right headlight and said, "That's about as good as you are going to get it to look. You can maybe sand it down just a bit smoother, then get a clear bra put on." He gave me a reference and encouraged me to shop around. Okay, I will. One more "armored" front ended Stinger, coming right up. Fifteen hundred bucks be damned. It's MY car and worth every dollar to stop this crap from happening again and again and again. I am going to have the entire front end covered right up to the windshield.
 
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