Most work concreters do is backbreaking. My dad was a builder but his first trade was "solid plasterer". He would get the plaster or concrete like glass. With concrete he had a tool, not unlike that one, that he made (and lent out) with interlocking hexagons like a bee hive frame for brood or honey.He used red oxide & later yellow as well (which I think are probably banned everywhere nowadays). He told me the design was not for looks but to prevent people slipping over. So why make it like glass?="that is the way a real tradesman does it". these days they use helicopters but still back breaking.Thanks for sharing. more nostalgia!

Cheers
Ranald