Hi I have just had my house fully replastered. im in the process of sanding it down and need to buy paint. I was planning to use a cheap trade matt emulsion as an undercoat and then use one or two coats of a quality dulux paint as my final coat. I came across some crown matt emulsion at a local store and was going to buy 150l tomorrow. Would this paint be suitable as an undercoat/miscoat? what do i have to do to use this as an undercoat (does it require thinning? how much and with what?). How should i go about it from here? Thanks