This is my first matt brushing and my first fullbrush car'll be if I can finish.

Use the donor I've sent you and use with distorsion some parts of that... the perspective is really similar to that
Did you have traced general lines of the car with body kit you wanna do?

do you mean this?
I sketched the front.

Yes this one, for doing better and precise outline of the bodykit try to use the pen tool:

- select pen tool
- go to Path label (usually is placed in the same window of Layers and Channels)
- create a new path
- trace with the pen lines (take a look in some tutorial site for learnig how pen tool works... and remember that if in future you wanna work with Photoshop this is thing you must know)
- now select a round brush size 1 pixel red color... select again pen tool, click on the path you've done, make a new layer and click to right mouse button and select "Stroke path"

Is more difficutl to explain that doing that I tell you that because looking at the front bumper I see square lines even where proabli needed rounded lines.

Anyway try to continue, every chop is a little step for you skills even if is not good or full of error (after lot of year I do even now mistakes... lot of them! ).

I used pen tool lol. But it is just a sketch to see what I want
Thanks.

Good use also "Smudge" tool for the matte paint

'lil update
I finish it for morning I go to have breakfast

Looks really good! Keep working in this way!

Thanks ^^

little update at the back