Lik Murfdurf I am a therapist. I've been waxing lips and chins since I was 18 and am at least a year or two older now.
Some of my clients have been with me for 30 years and they still seem to have retained a bit of skin!
As she has already said, IPL and laser are really only efficient n darkhairs, they at least have to have some pigmentation.
Electrolysis is effective but, as it has been said a long and quite painful process. I also do epil pro- a treatment that uses sound waves to damage the hair root. Not as effective as electrolysis but more hairs can be treated in a session so clients find it easier to live with. I very often combine both treatments and deal with the real brutes with electro.