I have recently tried to remove some oxidation from a metal scraper spatula by using vinegar. After leaving it there for a couple of hours I was left with a burnt smell (with a hint of burnt candle wax). Scraper has literal burns on it alongside vertical abrasions.
Since I have no background on chemistry besides an undergrad intro course and IB chemistry back in high school I'm trying to figure out what kind of a reaction I triggered?
Here are 2 photos that show the scraper while including a kitchen knife for color comparison. the scraper was lighter and more metallic looking than the knife. In the close up you can see the original color, the rust and the burn marks clearly.
Thanks in advance.