Wash and dry the vases, then use a paintbrush to apply a coat of decoupage to the outside of all the vases. The surface does not have to be completely dry to move on to the next step.
Cut white tissue paper into strips about 3-4” long. Apply strips to glass with decoupage medium and a paintbrush until glass is covered.
For stripes, cut tissue paper into strips and apply to glass using decoupage medium and a paintbrush. Continue applying different colors around the vase until covered.
For confetti design, cut tissue paper into small squares and apply to vase using decoupage medium and a paintbrush.
Allow vases to dry for 4 hours then apply 1-2 coats of gloss sealer.