Bad News: scratched cam journal

I took the car in for some chassis work (brakes, alignment) as well as a new timing belt and valve adjustment. By chance the mechanics noticed that the journals were swapped. The exhaust journals (? the part that comes off, not the part cast into the head) were over the intake valves. One of them had a scratch that I don't have a picture of. You can see the scratched shaft and journal in the pix below.
It's dicey, but we decided to try in-shop polishing and re-assembly over putting new headwork on short-block showing its age or going for a different engine just yet.