Frame paint?

[PaRedneckRiders]

Just got my frame pretty much all stripped down and im looking for a good paint, but not sure what to use.
Its going on a 4x4 k10 frame that will be in the mud and woods alot but i want something that will hold up decently to some abuse.
I was thinking get the frame sandblasted and primed then use POR-15, but it says to just clean the frame and apply directly to the rust.
Ive also heard of some people using a tractor implement paint but im not sure how well that would hold up, i just need some opinions on what i should use.