I can't say that I have Rich. In fairness, you can only paint what is there can't you? I doubt very much, using the fine texture is going to take out any pronounced imperfections, unless you go with the thicker texture products. I shouldn't think you will be able to spray it will you?
the only consolation with the Sandtex matt as far as I can see, it the fact that it is matt as opposed to the smooth, which has a slight sheen, so this may hide a few lumps from catching the light. I can't comment on the Dulux because it is vastly overpriced, which has made it prohibitive of me having the experience of using it.
Don't piss on my back & then tell me it's raining