As our factsheet here shows low back pain is one of a small number of conditions for which the evidence is good enough such that acupuncture is now a NICE recommendation for people with chronic non-specific back pain of over six months duration. This does not mean it doesn't work on many other things, only that the specific type of evidence accepted in the West is very narrow, and the vast quantity of Chinese research available is often methodologically less than perfect.
However, if your case the pain appears to have a very clear specific cause which may make it not be so amenable to treatment. If the scarring and adhesions are significant and permanent, it is possible that acupuncture may have little or no effect. That said, it is surprising how often a physical manifestation such as degeneration of the lower vertebrae or scar is adjudged without further ado to be the explicit cause of a pain. Most people over the age of 50, for example, are likely to be showing some signs of degeneration of the vertebrae in the lower spine, and that does not necessarily mean that this is the root of every reported back pain.
It would be worthwhile discussing the specifics of your case face to face with a practitioner to get a better idea of whether they feel that treatment may be able to help based on a proper inspection of the nature of the problem. The fact that you have scarring and adhesions suggest a wider pathology than simply back pain, and a practitioner would perhaps be able to make better sense of any patterns by actually looking directly at what's going on.