I'm new to cast iron. I have stripped and reseasoned several pieces in the last couple of months. Today I was working on a couple that I just purchased, one of them I knew was rough but it was only $5. I figured it could be a good learning experience, I was right. The center of the very bottom of the pan is pitted and flaking. I was able to get most of the flakes off. Can I save the skillet, the cooking surface is very nice? I attached a picture. Thank you in advance!