Smoking increases your risk of infection and poor wound healing in any cosmetic or surgical procedure. That being said, chemical peels would be much safer for smokers than lasers that remove the upper layers of skin. Lastly, there are different types of peels, superficial medium and deep and your risks of complications goes up the deeper you go.
This depends on the chemical peel. There are many different chemical peel for all kind of skin. Your Dermatologist or plastic surgeon can guide you better regarding the best peel for you or offer another treatments like Fraxel.