Originally posted by Kalysm:

Thank you for the info. I am basically asking in a roundabout way if it is a good weapon to use against Fulings as that is where I am heading next.

Frostner does 3 damage types. Blunt, Frost, and Spirit. The Blunt and Frost are applied instantly, with the Frost leaving a short slowing effect. The Spirit is applied as a DoT. Wet stuff automatically have a weakness to Frost.
When you hit something you should see different numbers for the Blunt and Frost, and then a DoT for Spirit. (the colors of the numbers will indicate weaknesses/resistances, if you see no DoT, its because the enemy is fully immune to Spirit)
The biggest downsides are: It is far less likely to stagger enemies because the Spirit damage isn't factored into stagger as its a DoT.
Anything resistant or immune to any of the damage types takes significantly less damage.

In Regards to Fulings, Fulings are fully Immune to Spirit damage, meaning about 20%+ of Frostners damage is negated on them. It does slow them which can help fighting groups.
It's best to upgrade to a dark metal weapon or the Porcupine as soon as you can in the plains to combat Fulings. Once you do Fulings go down much quicker.
Do not use Silver weapons against Fulings, you'll lose 1/3 or better of damage due to the spirit resistance.