Execution could be tidier. Now there is way too many different colors/shades going on. There seems to lime, green and yellow in there. Also the difference between brushed and copypasted areas is really big mainly because of this reason.
Also some angleissues on the tires, chassis and bumperarea.
Really cool skille, especially considering the base you used, i like all the different design elements you tried to incorporate here, and they come together well, nordic did mention some of the issues.