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.
The burn would be IN the platic not on it. Best solution would be to replace it. If you really can't do that, you can consider some combination of bleaching it to lighten the colour, or gently polishing it away (like a dremel and rouge) then clear coating.