Ok lads whent to see this job this afternoon and the customer whant some lime hemp plaster done and it a huge ceiling. The ceiling got insulated boards . The hemp in bags nock it back whith a mixer give the ceiling one coat 6mm brush it up for key second coat next day and trowel 3 .They say u can give a 12mm coat and trowel next day . I prefer the first one lol. Has anyone troweld this hemp up before any tips