ᐅ Recoloring or Painting Grey Concrete Planter Blocks

Hello everyone,

I want to build a roughly 20-meter (65 feet) long, 50 cm (20 inches) high wall in front of an earth embankment, which is basically nothing complicated.

The wall will be made using hollow chamber blocks, a type of construction block that falls between basement wall blocks and planter blocks.

However, these blocks are only available in gray, anthracite, and red. Since everything in my garden leans towards silver-gray, neither gray nor anthracite really fits. I am actually looking for something in a nuanced gray/anthracite shade or in that silver-gray tone, but this does not exist. The only blocks that come with that nuanced finish are the dry stone blocks.

So, I considered using the gray blocks (cheaper) and spraying them with paint using a spray gun that I have, which is powered by a compressor, to achieve the desired visual effect.

My question now is: which type of paint would be best suited for this purpose and adhere properly to concrete blocks?

As absurd as it may sound, I would get advice and stock up at a graffiti supply store. Because that is exactly the material used for the work, and they also want it to last a long time.

Not such a bad idea after all =)