What should I do about this Cactus?
Hi, I live in London and I have recently bought home a nopal cactus that was in clearance in a market. Despite it being a bit marked, I bought it home to see if I can restore it or give it a chance.
You see, the cactus leaves have these scab like white-ish marks on them, I tried doing some research and by what has come up - it looked like it may be mealybugs or pest infection. One of the treatments I found said to mix apple cider vinegar with water and test it on a patch, I tried that and it took off a tiny amount but I don't think its really doing much in the long run.
I was wondering if it is actually pest related or just marks from being old or from previously being in the wrong setting.
What should I do based on what you think it is and is it possible to save it?