Despite being bright green (almost luminous) the top-outs on that block are usually not too bad. They only take about a day to dry properly after damp weather if there is a bit of a breeze. That said, there has been a bit of rain in the south Peak today (Friday 27th). You'd be advised to take a big soft brush to remove any scrittle off the top. The 7b problem with the full-on leg jam start up the middle of the block is great and is still very do-able despite having lost one of its small crimps a couple of years back.