a shame there not plastic ones, as my son has polished up both outsides on his sisters KA
one was accident scratched, so he just polished out the scratches with fine wet an dry, then fine green scourer, then paint polishing stuff (farecla) ?? on a soft cloth, then finer body polish, then mums furniture polish..
he done both but one was much easier...
look like new sparkly headlights now....