Heat and redecorating

Last weekend was way too hot. But it was cool. Our main air conditioner died which gave me a two day reprieve from feeling guilty about not painting and/or wallpapering. I was back at it on Monday - I'm using wallpaper sizing as paint primer since there are no VOCs in sizing. The label says you can paint over it, so I am. I even called the sizing manufacturers and was told, that yes, you can paint over sizing. It's made that way in case you change your mind about wallpapering. Oh. Another option I hadn't thought of!