Not exactly….the colours will not fade but the smoke of light will remain in diya if you will light it…. To avoid it you should not allow the diya to burn completely….
Aap laga sakte hai Varnish….and diya mein oil dalke jalane k bad bhi paint nahi nikalta….bas thoda smoke ka kalapan aa jata hai…jo normal koi bhi diya mein aata hai….baki paint ko kuch nahi hota…