We are remodeling a frame house built in 1952 with plaster walls. While vacant, vandals spray painted graffiti on some walls. (Of course they never use pastels...lol, black and red mainly) Some of the walls also have hairline cracks. Most are credit card size or smaller...some are larger, after filling them how do you match the texture? Can you paint latex over the original Kilz, or does that take the newer latex Kilz (not as good?) The walls are oil based paint now. How do we repair this damage and what paint do we use? We are remodeling the home to sell as it is in another state from where we live (camping in yard is sooo fun... is a whole diff story) and even though we are on a time crunch we want to do it right where the buyers do not inherit a problem. Thank you for your time and advice.