Overlays aren't really an option because the coping is being cut to the same thickness as the original brick pavers. So, when placed on the mortar bed, they will be flush with the deck. If we keep the existing deck, we will definitely pressure wash with bleach. I think we may wait to see how the deck handles the removal of overgrown 40 year-old bushes. The decision-making window is short so we will see what happens.