I did think about that but it will come off, albeit with a bit of effort, and it needed something to give support where the nose had worn away.Sorry, but I'd want to keep Gripfill well away from a beautiful old staircase like that!
The stairs did need something serious doing to them as the had already claimed a victim.
The last lady of the family who owner the house from 1844 to 1987 unfortunately died as a result of a fall down them.
Hence the treads got sorted / leveled and I fitted the pigs ear.