Hasan,
This is a Transient Thermal problem, not Steady State.
It looks like you have a single 200 micrometer thick paint element on the surface. While you are figuring things out, start with ten 20 micrometer thick elements then reduce the element size once you get a model running. You need an element size of 1 or 2 micrometers through the thickness of the paint to get results like you show in the images.
It looks like the steel below has a different element size. If you use bonded contact between the paint and steel, you can use a different element size, but I would expect you want larger elements in the steel given the paint element size I just suggested.
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