Thanks guys. I've rubbed a bit of salt on top of it and then added boiling water. I'm curious to see the results. I'll apply veggie oil afterwords (1hour or so from now).
As for acetone, I used to use it in the past too, mostly on cd-cover stickets, but being that a strong chemical, I wonder whether that could have any health impacts in future uses of the frying pans, or even any left-over smel/taste?
I also don't have lighter fuel (zippo oil, I presume?) but I also found other recommendations on the internet with regards to it.