Yoroi Yoroi no Mi (Armor Fruit)

Yoroi Yoroi no Mi (Armor Fruit)
The user may turn at will whatever they touch into an inorganic, non-metallic substance that is as hard as diamond and just as impervious to damage from corrosive substances and extremes of temperature. This includes their body, a table, even a piece of paper.
Paramecia

How large an object can this fruit effect?

affect.

It depends on the user. Larger objects require more concentration and effort.

is the consentration required for the entire time the object is hard? Also you can just say "I consentrait REALLY hard" and be cheap with this, that limitation has no pratical implications....

Concentration implies an aspect of time passing.

but dose not really require any, most everyone that has tried to have that has ignored it or blown past it

Then as a mod you must have allowed them to do that

no they were disaproved.... or their abilitys were altered, or we gave them new limits to chose form

That's not what you put.

........... what?