I have an old staircase that will get a new surface in the form of oak lamellar. When I removed the carpet that was glued to the stairs, I see that the steps are significantly worn. See picture. What can I use to patch it to get an even surface? Sanding down doesn't seem feasible since the wear is up to 8mm.
It turned out to be Ardex A31 filler, works great, dries quickly!