Partial desaturation and other processes with a car

[Krikor]

In order to reproduce this tutorial I downloaded the image from the initial post.

However I couldn't find where @Ofnuts found the value h=240 for the car color!? 

As much as I walked the Color Picker Tool around the car, I generally found average values of H=165 (HSV) / H=180 (CIE LCh).


Which brings me to another question: How do I choose the part of the car where I will collect the HUE?

Another question is whether the mode to be used to correct the car's color is "LCh color" as read in the first post:

Quote:"Fixed by sampling the car color, and painting over the pot reflection in "Lch color" mode."

Or "HSL mode", as later instructed to denzjos in subsequent posts.

Another thing that caught my attention was the background color used by denzjos in his edition.
Considering that the color of the car is a very red hue, wouldn't the color around 180º of that hue be something close to cyan?

Thank you for your attention!