Replied by Ted (Bangkok, Thailand)
There are a couple of ways to remove scars, one is by an iodine rubbing, the other is DMSO with water, and there are others, not mentioned here. I will only described what I did to remove some scars. I think in case the scars have dried out the DMSO will work better. Iodine solution somewhat takes longer.
I once had a huge black scars on the elbow, and what I did was made an 80% DMSO plus 20% water, or sometimes a pure DMSO solution (maybe irritating) and get a white towel and rubbed the area as often as possible, and it will slowly erase most of the scars over a month's period.
Although dermatologist used a lot stronger solution than I do, depending on the nature and depth of a scar with a strong salicylic acid solution, which can vary from 5% to 20% for example which somewhat exfoliating. I tend to be more deliberate and used the DMSO solution, but it is slow.
The iodine solution (mine is a colorless one with hydroiodic acid plus potassium iodide where the iodine concentration is about 5%), which I make myself and rubbed onto the area of scars.
However, I prefer to use this in removing some age spots, which seemed to worked better for iodine, whenever a white cotton towel is rubbed (like a sandpaper) over the area. Of course, people have to experiment with that and see how well it works.
Another possibility I think is to use petroleum jelly which I also do and is a mild form of scar remover by using also a white towel and rubbed it several time when a petroleum jelly is applied. I can tell if some scars are removed whenever the towel gets or acquired a dark color and the skin seems to lighten up. It will take awhile but I think most of the scars should reduced over a month's period when enough of it is applied frequent enough. Aloe vera helps healing but I think at this stage, it is too late for now, so I guess just removing the scars is more reasonable.