I am an electrician who sometimes needs to cut and repair sheetrock. I've got the general idea of how to cut a reusable square and mount it. I'm going on to learning how to texture using joint compound. But what I need to know is what sort of paint to use. The vast majority of my work will involve white walls. I assume it's enamel. What I need to know is there a universal white that is more often than not used in newer homes?