I had some Water Based Latex paint that I was using in my Kitchen.....I got a couple of coats on 2 walls, then ran out of paint. Went to Lowes to get more.....I told them I was looking for Olympic Premium Interior Latex, Eggshell Finish in Merlot......now the paint I just put on the walls was a few years old, and the can that was mixed, and handed to me was the replacement as per the employee....the paint is a Primer and Paint in one.....same sheen, same color....but the new stuff is Enamel, and the stuff on the 2 walls is Latex.....now it seems the new stuff is covering better than the old.....can I put a coat of the new Enamel Paint over the Latex Paint I just put on the walls ?.....both are Water Based