Improving summoned weapons...is this possible?

[Souphin]

I don't know if this has already been asked but can an oracle using Ancestral Weapon or Iron Weapon improve these weapons. By buying upgrades or something like that for these weapons?

[Grick]

Souphin wrote:

I don't know if this has already been asked but can an oracle using Ancestral Weapon or Iron Weapon improve these weapons. By buying upgrades or something like that for these weapons?

You could cast Greater Magic Weapon on it, I suppose.