No way are those your wheels.
Here's what you do, since your wheels do have slight damage, have him take a picture of the FULL wheel, including your previous damage, including the new damage. That should debunk his bullshit pretty fast. Only thing he can claim on that it happened to be on the wheel without any damage to start. Otherwise he's busted.
edit: forgot to add this.....
... people like that ruin the world!