Plug doesn't look too bad RLP (slightly lean, but no burnt oil), I bet seeing the scoring was one of the 'oh s***' moments
As long as its not burning oil, making more noise or down on power, you could probably leave it.
Out of interest, what weight oil did you run in it?
Any engine with scoring (although this case minor) won't last as long as one without, so maybe try one of the engine oil additives with PTFE in it to prevent a bit of further wear. Now I am no great fan of these snake oils, but after the excellent job the oil stop leak did on 2 lower main bearings, there are some I believe in.
That being said, I would never suggest any that effect the viscosity (stop leaks and PTFE don't change viscosity).
Nulon Worn engine repair with PTFE is supposed to help restore engine compression. I have no vested interest with Nulon, just use their products.
Nulon was one of the first in the late 70's to get the PTFE to remain in suspension and has been on the market since in one form or another. They ran a 161 Torana (from memory) melb to sydney without oil (just the prior PTFE treatment) and there were no substantial damage on tear down beside a bit of play in a couple shell bearings (can't remember which). Think they installed solid lifters at hydro ones couldn't possibly work without oil.
That being said, I don't think any more scoring will occur after your oil change. Maybe run another 2 hours with current oil then drain to see if any more filings.
Regards
Tyler
