Choreboy wrote:
Many years ago I had good luck repainting rusty metal using naval jelly,
then primer, then enamel. Eight years ago I had good luck with POR 15,
but it was expenive.

I've read that Zero Rust is a cheaper paint and does a very good job.

I've also read that Picklex 20 is an excellent way to prepare a rusty
surface for painting. I've found only one source, which charges $31.50
a pint plus shipping.

Are Picklex 20 and Zero Rust the best ways to repaint rusty iron? Who
sells them?

Both are indeed specialty items and won't be found at your common
suppliers. Maybe but doubtful, at a paint store that specializes in
auto body paints and/ or restoration materials.

Zero Rust is available from JC Whitney.

Picklex20 may only be available online
http://tinyurl.com/82cuo

However you can email them and ask. http://www.picklex20.com/contact1.htm