I have plastered walls in my living room. It had wall paper on it and I stripped the paper washed all the glue off and there was a previous paint on the wall. I purchased Kiltz hide all for the primer and the wall looked great. So now I used Sherman Williams Super paint satin at 40 something a gallon. Well it is very thick and dried very fast but they said not to thin it well after the second coat it still showed roller marks and I have painted a lot in my life so I did a third coat still roller marks shiny and dull places when you look from the side looks great facing it. So thinking it is the paint I buy Valspar from lowes as I have used it before and haven't had any trouble. Well back to roller marks. Now what should I prime it again or can I just put a flat paint over it. I certainly cant leave it like it is. This is just one wall but I think that is because the rest of the walls are only seen from facing them. Any help would be appreciated I am 70 years old and frankly I am tired of painting this wall thanks drt