Last week I had to lay some concrete outdoors. Far too cold and late in the year (but it's a base for an oil tank, so I needed to get it done). So I had to cover it up overnight to protect it from frost.
I'd produced a good surface prior to covering it, but the weight of the plastic tarpaulin on top of the plastic sheeting going on too soon has resulted in a tatty surface with little folds and irregularities.
How best to clean up/improve the surface?