Interior latex wall paint is available in eggshell, flat, satin and semi-gloss finishes. A particular finish can be chosen in regard to the amount of light it reflects and its washability. Generally speaking, a shiny latex paint, such as semi-gloss or satin, is easy to clean, but also reflects a lot of light to create a shiny surface. With a flat wall paint just the opposite is true: less reflection usually results in a surface that cannot be washed as easily.
Acrylic latex porch and deck paint is now commonly used in both indoor and exterior locations. Where in the past, oil-based paint was often used for these tasks, the acrylic latex paints are now being used because of their increased durability and environment-friendly nature. Oil-based paints because of the large amount of alkyd fumes that they release into the air are increasingly subject to air quality regulations.
Due to the much-improved quality of both acrylic latex primers and finish paints, they are now used commonly in all types of outdoor house painting. One place where a latex acrylic paint cannot be used is when an existing layer of alkyd or oil-based paint needs to be covered. Like the old latex house paint, the new varieties are not designed to cover already-existing oil paint.