I'm using ready-mixed Ace brand joint compound, doing a thin skim coat on plasterboard walls that were paneled. There's a coat of primer over the first rough patching, but when I'm putting the next layer of joint compound on to smooth the walls more (a lot of the imperfections aren't noticeable until you have the smooth paint surface), and then sanding and wiping with a dry microfibre cloth there is still enough dust left to give me appalling adhesion problems with the topcoat (Benjamin Moore Natura). It's bubbling and peeling and when I went to wipe over the top of the (cured for one week) paint the paint starts to come off. Even spots that have two coats of topcoat over the joint compound will peel off when gently washed.
Help me! I tried wiping the dry joint compound with a wet cloth, but it takes the dust and joint compound off. A dry cloth didn't take off enough dust to let the paint stick. What should I use? A different cleaning method? Different paint? Different filler?
The walls are dry, it's not humid inside, the joint compound has cured for several days in most spots, the primer is water based and I really want to stay with water based if at all possible because I have young children.
Thanks in advance for any help you can give.