Brian, whose original art piece is the cause of us doing this wall, is looking very relaxed.
We took about 3 weeks during the hot summer weather.

See! Brian still looks pretty cool about it all...

The details: ordinary render - a new building, with some acrylic trowel-on finish - as in the adjacent wall. So I undercoated in limeproof sealer/undercoat - very tough. We scrambled over the walls with chalk lines to establish Brian's design. I brushed on a coat of marmorino, italian marble plaster; then troweled on a second coat.

Brian further established the lines between the panels... and used artist's acrylic to make blobs of orange, yellow and blue in these lines.

Then we had to get closer and closer to what Brian wanted to achieve. We managed this by using potassium silicate in a clear base, into which we could pigment and vary to form great subtlety in our finish. This had the advantage of integrating with the lime plaster materials underneath.

As we neared completion I gave the whole wall a further coat of potassium silicate. We then decided on a further coat of an exterior grade acrylic scumble.

It remained for Brian to do 3 smaller panels with artist's acrylic... working wet on wet he mixed on the wall and hassled until he was happy with the end result. The wall is about 6 metres high x 8 metres long.