... DMR1000 Gasoline Power TrowelUsage: used to polishing cement concrete poured ground polishing, puree trowel polishing, suitable for epoxy mortar surface, ... . Equiped with angle adjustable knife, make the ground smooth & flat.Advantage: Ground after polishing by this machine is of high hardness & ... curing period of 28 days. 48-72 hours later, ground can be open to other process after treating by this ...