Just thought I'd share the results. Pic 1 is a before picture of course.
I used Rustins "scratch cover - light". Yellowy looking stuff in a small glass bottle.
Initially the dark scratches showed up much darker (2nd pic), and I thought this was as good as it would get. Which was still an improvement, in fairness.
But after its completely dried, they have blended in FAR better. I was pretty amazed when I saw it later (pic 3)
Now, you can do several treatments of this stuff for deep scratches apparently to get the colour right, but so far this is all from ONE go, which took only 40 seconds to apply. I think with a 2nd it might look even better.
In areas not pictured, light scratches have disappeared entirely
Pretty amazing if you ask me! A great ratio of effort to result, which is what I wanted
Adam