I had a lower facelift/neck lift 8 weeks ago. Is it safe to get my sideburns/jawline, upper lip, and chin/neck area waxed?

With normal healing after a face and neck lift, there should not be a problem to have waxing of the sideburns/jawline, upper lip and chin/neck 8 weeks after surgery.  It is always best to ask your particular surgeon to be on the safe side.  

In general, it is safe to have areas of the face gently waxed 8 weeks after a lower facelift.  However it is best to check with your surgeon before proceeding to better determine if you have adequately healed.If a laser treatment or chemical peel was also performed at the same time the timeline to have waxing or laser hair removal may be longer.

... Yes, go for it! The only area I would have any concerns about (but not at 8 weeks) is the sideburn area.

Everyone is in a rush to have facial procedures performed after facelift surgery. Here is a list of facial procedures and when you can perform them;Make-up - typically, cover-up makeup can be applied gently by day #10 (ask your doctor).Ear rings - thats right - no ear rings for three weeks (heavy ones may even be longer).Color your hair - I advise my patients that they can color their hair when the incision behind their ears is fully healed. See your doctor to confirm that healing is complete.Facial waxing - waxing of areas not directly involved in the surgery can be performed 3 weeks after the surgery, but sideburns and cheek areas should wait until week #8.For more information, read my book "A More Beautiful You- Reverse aging through skin care, plastic surgery and lifestyle solutions.

At 8 weeks provided that you are completely healed, you probably  can get waxed but always a good idea to check with your surgeon.