Here we had a highrise unit with a very dark external tile and the owner wanted to have the exterior more reflect the internal floor tile, giving more of a flow thru effect. To replace the tiles was almost impossible due to access issues.
We approached Dulux to find a paintable solution. We were given a method using brushable 2Pacs to give optimum adhession and durability.
The result is amazing. We sponged three colours into the final look to acheive a more authentic theme and the owners are more than happy with the results at about 1/2 the price of replacing the tiles.