From DIYinfo.org
Low contrast is best for this finish, otherwise the room can look as though a demented animal has run across the walls! It is essential that you use real sea sponges as they impart a soft, subtle shape not possible with synthetic sponges.
[edit] Materials
[edit] Oil-based glaze
- one part matt/flat enamel
- one part scumble medium
- one to two parts turps (white spirit)
[edit] Water-based glaze
- one part matt/flat acrylic
- one part water scumble
- three parts or more water
[edit] Special Tools Needed
- sea sponges
- 50 mm cutting-in brush
- round stipple brush
[edit] Method
1. I Dip the sponges in water and wring them out - this makes them soft and malleable. Load one sponge with the glaze and apply to the wall in a random pattern -working an area about 900 mm wide at a time from floor to ceiling.
2. Dip a second sponge into turps (white spirit), or water if using a water-based glaze, and start to soften the harsh edges of the glaze. Move the glaze around a little, taking some into the background space where there is no glaze at all. This creates a feeling of depth, and creates another tone. Make sure that you work quickly and do not allow the glaze to dry up or you will have harsh join marks where you apply the next section.
3. Corners are a little tricky and it is wise to use a cutting in brush or a round stipple brush to help you get into the join. The last thing you want is a strong white line running down the corners of the room. If you think the finish is too strong, follow up with an overglaze.