I Went With A Patchwork Design In The End.

https://twitterwithbraincells.blogspot.com/2024/10/and-what-steps-is-us-taking-to-remove.html

In the sense that, funnily enough, the concrete is a completely different colour from the concrete that's been exposed to the elements for 50 something years.

After a wash and a beer I decided the new bits look like little gray rivers running into a drain. Just before the asphalt rises.

Which is probably caused the cracks in the first place.

Although sure that will come as a genuine surprise to any signatory to the Paris Agreement.

Water eroding Limestone.