- 1). Use a power sprayer attachment on a hose to wash the wall with detergent, and rinse it clean. Take special care to remove any oil spots on the cinder blocks. Let the wall dry thoroughly overnight. Use a paint brush or paint spray gun to apply an even coat of bonding agent to the entire wall. Let it dry thoroughly.
- 2). Fill your hawk (flat tray with a handle) with stucco using a trowel. Place the hawk against the wall, and scoop stucco on the wall with a trowel to make the scratch coat. Spread the stucco on the wall with a sweeping motion until the wall is covered with an even layer ¼-inch thick. Use pressure to force the stucco into the pores of the cinder block to create a strong bond in the scratch coat. Give the scratch coat 3 to 4 hours of drying time before you use a stucco scratch rake to score the scratch coat. Rake in any direction you want.
- 3). Allow the scratch coat to dry for 2 to 3 days. Mist the scratch coat several times a day with a spray bottle filled with water. Keep the scratch moist during drying.
- 4). Fill your hawk with stucco using a trowel, and apply a second coat of stucco ¼-inch thick. Coat the entire wall evenly. Smooth corners and edges with a putty knife.
- 5). Use a trowel, broom, or float to make a pattern on the final layer of stucco. Common patterns are swirls made with a trowel or float, stippling (patting the stucco with the ends of broom bristles), waves using a sweeping broom or create a smooth surface with a wet sponge. Make imprints on the wet stucco with hands, plastic cup for circles, or anything that will make an interesting design.
- 6). Mist the final coat several times a day with a spray bottle filled with water during curing.
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