No worries. It could have been anything, never exactly took care of the thing when in use. Then again, this is in line with my other leather products, and none have stumped me like this one.
It has been a while since this issue surfaced, and I have only just decided to try and clean it up.
I will try to look for that thread, thank you.
Shall not dabble with oxalic acid then. Seems like the spots got lighter over 3 days of basically dousing it in vinegar. None of the spots dissappeared though - as you said, it is likely that I am just stripping away the finish, rather than clearing the spots, hence the lighter appearance.
Considered re-dying as my worst case solution. Will take your advice if nothing else comes up. Thanks.
Unfortunate, it was supposed to be a utilitarian brand that puts out decent quality stuff and I barely used the bag since I got it. Though I must admit, I never babied it during it's calls of duty. Only ever applied Obenauf as a protectant.
The couple of hundreds I spent on it is the only reason why I am trying to save it.
No doubt it is leather. Quality of leather, however, is debatable.