On Oct 19, 9:10*am, "Dave Plowman (News)"
wrote:
In article
,
* wrote:

I reckon they mixed the whole lot together rather than putting on a
mortar coat then throwing the pebbles at it.
nowt wrong with that, then rinsing it to expose the stone.

More difficult to get an even appearance, though?

perhaps if the wrong technique was used, or the procedure was
especially well royally bllsed up - I dont see how the problem shown
would result from doing the rinse approach properly.


NT