Alright, instead of arguing the toss on here(gotta say i thought dello was talking bollox),had the perfect opportunity to try this method today on some small retaining walls.Laid it on,ruled it flat,let it pick up and superflexed 16inch and hey presto flat as f'''',left it and just sponged it brillliant.The plzzy flattened it with no marks unlike steel.
On the down side fuc nows how he rubs up with it.At this moment i better add im a tradionalist 30 years spreading blah blah blah but this did flatten it a lot easier even laying a hawk full on with the plaz to fill in