I came across a Stanley #4 plane. Probably came from Home Depot in the 1980s. I thought I might fix it up. I put sandpaper on a flat cast iron table and started sanding, and the photo shows what came out. There are pits that are probably 0.020" deep in one side of the sole.
I have a mill, and I can fly-cut this thing, but I am wondering if it's worth it. The sole isn't that thick to begin with, and I will have to take off 10% of it.
If it's a waste of time, I can pitch it and get one off Ebay.
05 29 15 Stanley 4 plane with sole pitting.jpg