Firstly, you should make sure that your glass vase is dry, clean and free of grease residue. Cover the vase with adhesive tape in the areas where you don't want any colour to get on. In our case, we opted for strips of different colours. Once you have chosen a colour of Edding permanent spray, turn the vase upside down and spray evenly and in light coats in a criss-cross pattern to achieve an even result.
Allow the colour to dry briefly and carefully peel off the adhesive tape. Then allow to dry thoroughly, we recommend 24 hours.