Does MPen work for skills dealing Physical DMG?

[quote=KidProdigyz]^ Pretty much what the title says. I've recently started playing champions that is totally physical damage based with no ability power skills whatsoever. Being a person that likes to do damage, I wanted to know if Magic Penetration would work for skills like Paaarley and Acid Hunter (This question came up due to finding some people getting the Magic Pen. mastery on champions that don't use any ability power). Thank you :)![/quote]

[quote=Mowen]No, you would have to get armor penetration. If you click on the link in my sig you can find the New Player FAQ, it might help you a lot, and it has sections on ap/ad and mpen/arpen.[/quote]

[quote=Trojan995]There's something you should be aware of, however: There are some skills that scale off of AD, but deal magic damage. For this, you'd want to get Magic Pen. I can't think of any examples currently, except for the brief period of time in which Udyr's [[tiger stance]] scaled off of AD and dealt magic damage (The DoT portion, at least).[/quote]

[quote=wRAthoFVuLK]Kat's Bouncing Blade + ulti use AP and AD but both deal magic damage, hence you use magic pen[/quote]