We did 1:3 ratio when sprayed in the gutter it brightened up so much.

I sprayed them down with some water and gently lifted them up, trying not to break them apart, and sealed them up in plastic bags. 

I have picked up a few old signs that were no longer standing, I'll actually spray paint over the current writing and hand write on top of that, paint costs less than a sign and it's less wasteful.  

What's worse would be them spraying all over the place.

Did you apply closed/open cell spray foam - or strap and use packed cellulose/hemp/fibre - the outer walls and underside of the roof deck (requiring an over roof) or did you maintain ventilation under the roof-deck and insulate over your ceiling?

Once all the drywall is gone the contractor would need to spray a biocide that will kill any remaining mold spores....they are very tiny so spray each stud and the wall behind it.

Rehabbing windows and starting interior millwork.Closed Cell spray foam under roof for air tightness and max R-value in shallow rafters:Basement walls lines with 1.5" EPS foam board before framingSuper expensive historic reproduction windows that meet egress

I prefer the brush on kit over the spray on kit, because the overspray is difficult to contain.Definitely use a respirator, and follow the instructions EXACTLY or it will not work properly.  

The FD came in, smashed everyones doors in, and sprayed 800 gallons of water up into her ceiling, which surprisingly only mildly affected mine.  

I spray foam insulated the building with the first two units but the $750 building the tenant has stored too much in his basement so once there is turnover I will do that basement.