to scale use the button( " select and uniform scale") next to rotate tool. to modify parts,select car,on right side menu "modify" if u cant see vertex,poly,element etc,than dropdown menu,edit poly and then you can delete parts etc.




When I added the skin, they disappeared. Probably changed something, that wasn't supposed to be changed...
I'll try to find some tutorials with nice reflections for my next render, if I won't be too lazy. 






