Recoloring / painting gray planting stones, etc.

Hello everyone,

I want to build an approximately 20-meter-long, 50 cm high wall in front of an earth embankment, which is not a big deal.

The whole thing is to be done with hollow chamber stones, a construction style between cellar wall stones and planter stones.

However, they are only available in gray, anthracite, and red. Since everything in my garden is in the direction of silver gray, neither one fits. But I am actually looking for something in gray/anthracite nuanced, or in the silver gray color tone, which does not exist; only the dry stone walls have this nuance.

Now I have thought about, for example, taking the gray ones (cheaper) and spraying them with a paint sprayer that I have, which is powered by a compressor, with paint in such a way that you get a corresponding optical appearance.

Now the question is, which paint would be best suited for this, and would also adhere properly to the concrete stone.

As absurd as it sounds, I would get advice and stock up at the graffiti shop. Because that is exactly what the works are done with and they also want it to last a long time.

Not such a bad idea after all =)