Work in a well ventilated area or outside, and cover the area with newspaper or other coverings to protect furniture.
Clean and dry your terracotta pots.
Tape off the area just below the rim with painters tape if desired.
Fill the aluminum pan with water.
Spray paints on top of the water about 8 inches in short bursts.
Use a wooden skewer or a plastic knife to swirl the paint giving it a marble effect.
For painting the top rim, dunk the top of the pot upside down into the paint just until you get to the painters tape and lift up.
Continue dipping the top into the paint and/or adding more paint if needed until you get a look you like.
To paint a full pot, dip the pot into the paint on its side and roll it around until you get it covered. Continue adding more paint to the water and dipping the pot until you get a look you like.
Place the pots on newspaper to fully dry.