For a first attempt they look exceptional.
X2 on the POR 15.
Get it in pints at the most.
Have you considered some of the home remedies for rust (molases bath, citiric acid wash, Washing soda and electricity )?
Several thread on the interwebs about all those and while time consuming (you have to let any of them soak a while) they let you do other things while they work on removing the rust.
Wire wheel if no other way, just make sure you have a good dust mask, I made that mistake, once. Coughed up rust colored crud for a month.
