Are you all using the provided blue sponge or the microsuede applicators?
I used the provided blue sponge, but what I did was cut off the ends of the circle along the edges of the finger "loop" on the back so as to make a rectangular applicator about half the size of the original. Prefer this to suede.
As a note, and part of another conversation I have been having in another area about coatings:
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Just for the wheels and calipers I used the ENTIRE 10cc of product. I didn't have any "high spot" issue I simply applied it as thick and uniform as possible. So based on this I have to step back and ask how anyone does all the paint and/or wheels on a care with 10cc or less of product. In my mind it just doesn't make sense.
If I used 10cc of gloss coat in a single coat on those wheels, I'd have to wipe off a decent amount of product as high spots (after waiting 2-3 minutes). I know this because I had to wipe off high spots on every single panel I applied to, despite only using 5cc for the first coat. Not sure how much product remained in your applicator or how long you wait for the product to flash off.
By stating you applied it as thick as possible, I think you are implying that you were trying to create the thickest (in terms of microns) coating as you could on your wheels. That is a debate for another thread and certainly a pet topic of yours. I don't have anything constructive to add to that discussion.
What I can say, is that using 10cc to coat an entire car the size of a GTI would be pretty easy. The product spreads far. You can see a film covering the entire surface you just applied the product to, albeit a thin one. If you were to swipe your finger across the paint a few seconds after application, you could see that the film didn't wipe off, but rather was smeared in the direction your finger traveled. Also, particularly on darker paints, you can see the entire area "rainbow" after application. Then it starts to disappear.
Whether this is creating a sufficiently thick coat or not, I cannot answer. I'll leave that to you or qualified chemists. But you pretty much answered your own question about why some only use 5cc and you used 10cc on your wheels. You applied the product as thick as you could.