Hi, I have a concrete imprint driveway in fairly good condition about 30ft by 30ft. The imprint is too deep in areas and even when powerhosed is hard to keep clean especially with decaying dead leaves. Is there any thing i can apply to help make the cobble more level or apply a type of resin or screed that would be okay to powerhose or sweep. I can only raise the level by a few millimetres due to the hall door area.