Hello I have a problem with ceiling paint. I added a new room so I had to do some drywall work - where I taped or added I had to scrape the texture from the ceiling. In preparation for paint I put on a drywall primer from Benajamen Moore and then I sprayed texture from Synco (white). Everywhere that there was previously old ceiling texture and where I tried to feather in the spray the ceiling has turned Yellow. Any ideas on cause or how to fix?

My daughter is buying her first house, it came with a new metal construction Florida room. Basically in the summer it's too hot and the ac runs constantly. She wants to just put up regular walls with insulation, and plaster board on the inside against the preexisting metal walls, to cut down on the heat load. Is this possible or is there some reason it is not advisable? Several contractors she contacted said it's impossible, mold will build up between the metal and wood framed walls. They want to totally rip it down and start from scratch. The Florida room is only a few years old, she thinks that is wasteful, and can't afford what the contractors are asking. These metal walls are filled with about one inch of Styrofoam insulation.