Hi @younghooL,
A warm welcome to the Bunnings Workshop community, it is fantastic to have you with us.
That's a doozy of a burn mark. Unfortunately, I am not confident you are going to be able to fix this mark in a way that would completely remove all evidence it was there, but we can certainly give it a crack.
You could start by using a Mr Clean Eraser Pad Block to try and remove some of the colour.
You could also try a cream cleaner such as Gumption or The Pink Stuff.
Giving it a light rub with some Super Fine Steel Wool could also help to remove some of the burnt colour. As you are using an abrasive, just be careful not to pierce through the coating.
The sections where the coating has melted through will need some extra attention. It won't look perfect, but filling them with PC-11 56g White Epoxy Paste and then painting them to match their surroundings will certainly help mask the burn mark.
If these options don't work, then I'd suggest contacting someone who specialises in benchtop repairs or consider replacing the benchtop altogether.
Allow me to tag @Dave-1, @DIYGnome and @Noyade to see if they have any ideas.
Let me know what you think and if you have further questions, please don't hesitate to ask.
Jacob
