Now that you have the outline in place, it is time to fill in the colour. Here again there are two types -- water and solvent based. Camlin and Fevicryl are the most popular brands.
A word of caution: Too much exposure to sunlight can cause this type of paint to fade.
Solvent-based glass colours are permanent colours and should be used for larger paintings.
You can highlight the paintings by strategically placing lamps and light bulbs around them.
Photograph: Rediff Archives
Also read: What's your mood colour today?