Ok, so I managed about 2/3 of my roof the other day and it went ok, consolidated the resin happily and it has set up nicely.   Then we got hit by rain again and some got round the tarp and onto the boards in the section we've not done.   By today I thought the boards were dry (~10% on my electronic meter, and did a condensation test with some clear plastic in the sunshine for an hour).   As we laid the first piece of CSM it formed some big bubbles. The paddle roller