From DIYinfo.org
If using water based mediums, add one part glaze to two parts water. You must always use your common sense when thinning, as the viscosity of paint and scumble medium can vary dramatically. The glaze should always sit on the background as a cover not a texture. If you find there is texture in the glaze, it is too thick and you will need to thin it.
It is recommended that stippling is kept for the smaller areas of a room. Stippled doors, skirting boards, architraves and cornices look wonderful. One of the most difficult finishes to perform expertly is a stippled wall.
[edit] Materials
- one part matt/flat enamel
- one part scumble medium
- one or two parts turps (white spirit)
[edit] Special Tools Needed
- roller or brush to apply the glaze
- rectangular wall stipple brush
[edit] Method
1. Quickly apply the glaze to the background, leaving a ragged edge (this is in case the edge dries out and you get a seam line - a ragged seam line is less obvious than a straight join).
2. Now bounce the brush up and down into the glaze. Keep wiping off the brush so that any excess glaze is removed from the brush and not returned to the paint surface.
3. When the area is completed, remove the masking tape and allow the glaze to dry overnight. The result is the soft look of an unvarnished finish. If desired, a coat or two of satin varnish may be applied.