Railing plinth advice needed

[Ted]

So later this month my instructions are to repair/paint the railings and plinth outside the front of the house.
The railings I’m fine with - rub them down and hammerite them.
The stone plinth they go into is a soft sandstone and over the years has worn away and been repaired with mortar as per the pics.
What I plan on doing is remove old mortar and loose stonework, clamp a foorboard or similar each side with ‘F’ clamps and pour in concrete to the original level. I’ll probably paint it with stone paint when done.
Does this make sense? Are there better ways of doing it?
Also, is there a simple way of getting a small radius at the top so water doesn’t collect, and as I’ll be doing it in (at least) two stages, do I need to put anything between the two ‘runs’ of concrete?

I’d complain to the builder for using soft sandstone, but as the house is over 150 years old, he might not still be around.

Thank you in advance for any help.

https://photos.app.goo.gl/CyWsjZqZbUca5pXn6

https://photos.app.goo.gl/nr2yvkXjvu7r9BEM6

https://photos.app.goo.gl/FakRJq1tpYwa2bFW9

https://photos.app.goo.gl/TBeiTVCARvTvefrM9

 

[WDB124066]

I've just experimented with a cheaper option to paint concrete and used PPG outdoor paint. White strip on the step leading edges to help in the dark, it seems to stick remarkably well Ted and it is cheap!

 

[E53AMG]

If it were mine I would replace with small ornamental brick wall using scrap value of the railings to help fund.

Sent from my SM-G955F using Tapatalk

 

[Ted]

Well, it’s taken a few days, and I still need to tidy up the plinth a bit and paint it, but I’m happy with the result so far. Had to take out a lot more of the stone than expected.
Might not do another 150 years, but would have been a shame to lose them.

https://photos.app.goo.gl/E6DabZbxvNGAXEMH7

https://photos.app.goo.gl/P4wRfbZGBRv3STP99

 

[Deleted member 37751]

Looks good Ted.

I assume, judging by the description in your first post, you’ve made a bit of shuttering and formed the concrete using that?

 

[E63AMG]

Great job that!

 

[Ted]

Looks good Ted.

I assume, judging by the description in your first post, you’ve made a bit of shuttering and formed the concrete using that?

Just what I did
I wasn't sure if that was the best thing to do, but it turned out well.

 

[Jonesy161]

Lovely job, what you like at pointing?

 

[Ted]

Lovely job, what you like at pointing?

Rubbish!
Although my next door neighbour pointed part of one of his walls a few weeks ago and did a fantastic job.
He’s a real perfectionist - puts me to shame.

 

[Deleted member 113659]

Looks good Ted.

Although I do fear for a few hard winters of frost given the strong concrete cast onto soft sandstone.

 

[Ted]

Hoping that a couple of coats of masonry paint should stop any water getting in.
Time will tell

 

[Bobby Dazzler]

Cracking job. When it’s weathered a little it will look even better.