nice work , some work on the red to match the bg would help
and a color filter would really bring this too life
try this ::::
brighten the red a bit so its matches the bg better
try brushing over the whole pic with brown , then select fade brush , then set blending mode to color dodge and lower the effect - bar untill it looks good
this way the car and bg both have the same tones all over )hue( and it looks like sun shine
you will see its only 10 minutes work but makes a whole lot of difference
if you poay with this way of colorfiltering instead of the build in ps filter you will see the possability is endless
you can give everything blue hue and after that make the sun shine
try different blending modes also
you can brush only a top part of a pic with a mild brush and low setting and create certain light effects
always just brush over your pic with a color and then fad ebrush tool and play with difefrent blending modes and opacity´s
for sun brown works great