How do i make sponge painted walls smooth?

The bottom 1/2 of my walls are sponge painted, and the top 1/2 is just white... i want to re-do the room and paint it all brown, and have the whole wall smooth... how do i go about starting this project and getting the roughness of the sponge paint off the walls?How do i make sponge painted walls smooth?
you have to sand your walls, using 150 gird sand paper sand sponge surface first pretty good then sand white lightly. then prime it and paint it.How do i make sponge painted walls smooth?
Get your honey to sand the walls for you and prime them while you kick back and relax with a tall cool drink
You have to sand it down prior to priming the wall and then painting. The key is to take your time sanding since you don't want to sand too deep into the plaster or dry wall and have even areas. Be sure that you wear a mask or respirator so you don't breath in any of the paint particles since they can possibly contain lead.