Raw, Heavy, Sharp, Refined, and Hollow infused weapons can be buffed. Deep, Fire, Chaos, Magic, Dark, lightning, bleed, and poisons weapons cannot be buffed.

Can heavy infusion be buffed?

Depends on the infusion. Sharp, Raw, Heavy, Refined and Hollow can be buffed. The status and elemental infusions cannot.

Can raw infused weapons be buffed?

Raw weapons can be buffed with resins or weapon buffs.