Sorry for the tardy update. Thanks to the helpful folks on this forum I painted my 1963 Mercury Comet in 2009 then sold it in 2016. The paint held up great and yes, it was Rustoleum and I used the 4 inch foam rollers. Here is the last pic as the new owner drove it away:

The paint looked pretty good for 7 years parked outside and $50 for the paint job... More pier here: 1963 Comet $50 Paint Job