Umm. Thanks for the input and you are absolutely right about climbing sandstone when it is wet. If you have ever been there in a downpour you would know that this route stays completely dry. But, don't tell anyone.
fwiw- sandstone absorbs water like a sponge, and even if it looks dry, in a downpour like that, all the rock will be wet just underneath the surface after a short time. So really, please do not climb sandstone in flood conditions, even if it 'looks' dry.