Well besides the fact that they sometimes come in different colours (e.g. chrome, shadow chrome, etc) but for regular colours it's true.
Gluck, show us some pics when you're done mate!
btw. if you're covering large surfaces, not just spot repairs, then you may need to spray gun. And if you have any heavy rashing, use a metal file and grind it flat... and then use a metal reinforced putty.