The concept of "charcoal painting on 18 treasures for debut" is not a standard or widely recognized practice or tradition. It's likely a unique and personalized idea that needs further context to understand its meaning.

To decipher its meaning, we need more information. Could you please provide some context, such as:

* What is the "debut" referring to? Is it a debut into society, a musical debut, a debut of a new product, or something else entirely?

* What are the "18 treasures"? Are these specific objects, concepts, or something else?

* What is the significance of using charcoal painting? Is it related to the style, the symbolism of charcoal, or something else?

Once you provide more context, it will be easier to understand the meaning behind this idea and its significance for the debut.