I guess the key to this is would be as soon after the chip occurs as possible?
My sisters car has a few of these in her bonnet but she's left them so long they've gone a little rusty. Which obviously means its down to the metal too.
Sent from my iPhone using Tapatalk
I wouldn't like to say.
But, if you use some of the chemical stuff on the spot of rust, I can't see why this wouldn't improve it.
They don't really need to be fresh chips either, as long as the edges haven't been buffed smooth.