Gather your decoupage glue and paintbrush. Apply a very thin layer to the outside of your jar. When dry, the jar should be cloudy.
Squeeze some white acrylic paint into a bowl and paint one thin layer onto the jar. Let this dry and then paint another layer.
Blow dry the jar.
Using the tape, Crete a zigzag pattern on the side of the jar.
Paint in between the prices of tape. Blow dry afterwards.
Take off the tape.
Apply more decoupage glue and let that dry.