I am staining a brand new cedar deck that is screened in completely, the builders even put screen underneith the deck. Where my issue is, that the screen under the deck is permanently installed, I can not remove it, can I spray the underside with a sprayer using the sikkens stain and will it go through the screen? The deck is on the second level with a concrete pad below, (well the concrete hasn't been poured yet waiting for the deck to be stained.) or should I leave the underside unstained. The screen is all the way up to the bottom of the floor boards. And my second question is, how long should I wait before I can stain the treated floor Joists. Or should that not be stained at all? Thanks for your help!!!