hi just looking for any tips on lime skim ,I'm doing a job big walls 30 metres long 4 high some even bigger .we have started to lime skim ,it's mixed at 3 silica sand to 2 nhl we lay on the first coat let it pull in then apply the second coat let that pull in then give it a pass with a sponge float then trowel off ,just looking for any tips to stop shading or any tips in general to make life a bit easier,,cheers to all