How well does the non-flamable kilz spray? I am re-doing a house w/ massive ciggerette stains on the walls and ceilings. Also there was a dog many other stains, water stains etc. I've only used the flamable kilz on floors before putting new carpet and when we do that it's just poured on a rolled in and I've used the spray cans for spot treating. Just wondering if anybody has tried spraying it and what their experiences were with it. Obviously I won't even try to spray the flamable type and I've tried the water based and I wasn't happy with it.