cross-posted from: https://lemmy.ca/post/54746362
I was burning a cone incense and left it on the sink, and this stain won't come off. I tried baking soda, water, vinegar, hydrogen peroxide. I tried letting them sit for multiple interations, and it made no difference.
I would likely try the methods of car headlight repair:
However, since I see that the sink has a glossy surface... I would be deterred by that. The method I mention may reach a layer which isn't burnt, but will wear off glossy finish and there's no certainty of it returning in the same tone after polishing is done.
What paint to use - sorry, no idea.