Paint-Over-Rust products

[chevyrestoguy]

I am going to paint my chassis in the next few weeks, and was wondering what products you guys have used for painting over rust. My '64 is far from being a show vehicle, but after de-greasing the chassis, there are a bunch of places that have surface rust that I want to cover. My plan is to use a paint-over-rust product, and I plan on brush painting the entire chassis because I don't want to pull the cab and bed just to spray the chassis. I have used POR-15 years ago, but I thought that it was a bit too shiny. I want a semi-flat chassis black finish in an easy to use product that doesn't show brush marks.

What other products besides POR-15 have you guys used? I really like to hear how well they performed and how much they cost.