Why would you, at this point? Something is wrong. Metallurgy. Casting. Something is wrong with it.
Not my business of course, but I wouldnt build an overlander out an SUV with a rusted through frame. If theres a problem with the metallurgy or the casting of a cast. iron pan, those are the two fundamentals.
I feel like, if you tried with this pan some more, it would be like me watching you try to survive a week in the wild with a Coughlin's knock off Swiss Army Knife. You'd be out there and some of the little tools would break or bend. Some wouldnt even open. And when you were all narrowed, exhausted and frustrated, you'd go out and but a Victorinox Huntsman for next time. Just my 2 cents worth, of course.
A Lodge pan can be gotten at Target, Walmart, sometimes Marshalls, TJMax or Home Goods on the cheap. An hour of sanding, rinsing, drying, oiling and baking one of those would make you much happier
But good luck if you decide to keep trying