@jolly That’s a great idea, big issue is there is NO ventilation down here. No heat. (We used plug in heaters). One people sized door that is coming in the front. (That’s probably some sort of business code violation right there, but this is Butte, and people don’t seem to care about a lot of that stuff here). One small window in the front gallery that might open (not sure, haven’t checked it to see if it does) So it’s going to have to be water based, whatever we do. (Still fumes with those, but not quite as bad). Here I’ve been mopping because I’m worried about what’s in the dust from the construction, but I should probably be more worried about the radon, as we are underground. The windows in the front gallery photo are at sidewalk level outside.