To the touch, they still have the chalky feel of flat finishes, but with a slight waxy smoothness. The same paint color will appear slightly richer in a satin sheen than it does in a flat sheen. Satin/eggshell finishes can be wiped down or even hosed with water. Because of the hint of shine, satin paints have a somewhat more luxurious appearance than flat paints.
Satin paints require a bit more care during application in order to avoid lap marks. As with interior painting, it is important to keep a wet edge during application. It is important that satin paints be thoroughly mixed before application to keep the resins and pigments in uniform ratio throughout the can. Satin paints should be mixed just before every painting session.
As the dance proceeds, keep an eye on the weather. Rain can wash freshly applied latex right off the wall, and a temperature dip below 50 degrees F two days after application can interfere with adhesion and curing and dull the sheen of glossy paints. (Latexes like Sherwin-Williams's Duration and Benjamin Moore's MoorGard Low Lustre are formulated to tolerate temps as low as 35 and 40 degrees, respectively.)