Dust can settle inside the paint or primer since it dries. For that smoothest closing coat, sand amongst coats of primer or paint with 220-grit sandpaper or an additional-high-quality sanding sponge. Then vacuum and tack as regular just before recoating. Then on the floor, I used a 9’x12′ fall cloth. http://whatpaintshouldiuseforkit60258.topbloghub.com/537308/an-unbiased-view-of-how-to-prep-cabinets-for-enamel-painting