Select a sample stone surface to use as your model. Prime your surface if painting over an area that is glossy or unpainted. Choose a base paint that is the basic overall color of the stone you are going to imitate. Use a latex-based paint for normal interior conditions and an oil-based paint for exterior faux painting. Apply one or two coats of paint to achieve full coverage.
Mix several different similar shades of glaze. Use three parts glaze, one part base paint and several drops of tint in different earth tones for each glaze. Refer to your sample when mixing appropriate glaze colors. Keep variations between glazes subtle for a more realistic decorative finish.
Apply and remove glazes using different techniques, overlapping the various shades. Brush on with a chip brush and soften with a handful of bunched-up rags. Dip with sea sponge directly in the glaze, remove excess glaze with a rag and pounce sponge on the surface. Experiment with crumpled plastic bags to disperse paint. Soften and blend surface with a flat pad of rags, if necessary. Allow glazed surface to dry completely before adding faux mortar.
Draw the outline of your stone shapes with chalk. Tint your base paint to mix the desired color of your faux mortar. Paint around your stones. Apply two coats if necessary.
Things You Will Need
- Low-tack painters tape
- Primer, optional
- Paint in eggshell finish
- Three-inch paint brush
- Roller and handle
- Paint pan
- Glazing liquid
- Stir stick
- Tint, raw umber, burnt sienna, raw sienna, black, white
- Chip brushes, assorted widths
- Clean cotton rags
- Sea sponge
- Plastic bags
- Protect and seal your finish with a layer of varnish. Select a varnish in a satin or matte finish for a more rustic look.