Nitro paste will cause a dilation of the veins in the area to which it is applied. Smokers primarily have an arterial flow deficit. Notro paste can be used as a option when things are nto going well, but you don't want to be in the situtation in which things are not going well. Stop smoking 4 weeks prior to your surgery.
In order to minimize the risks that smoking creates on a face/necklift procedure, it is best to discontinue smoking altogether before surgery. In my practice I have patients stop smoking 1 month prior to surgery and no smoking for 1 month following surgery. Hence, one might as well quit altogether...a good time to consider it. In addition, I would not count on any ointment to salvage a problem with the skin caused by smoking.