I'm playing a smiting monk, and this is my first character, so I'm still trying to figure some of this stuff out. I'd be grateful for your patience with me.

1. As I'm advancing, if I don't buy better armor and instead buy the tattoos/designs, can this be "infused" when I get to that point later in the game, or does it have to be actual armor/vestments/pants/sandals for infusion?
2. If I have these tattos/designs for scalp, torso, arms, legs and feet, may I appy runes to them like I would to armor?
3. IF I buy more than one rune of a particular type and apply the same rune to different body parts (i.e., chest and legs), will I get the benefit of both? I understand I cannot stack multiple runes on the same body part.
4. May I use dyes on the tattoos/designs, or only on actual clothing/armor?
Thanks for your help.
Michael