Originally Posted By blewbyu
I've used Eastwood cast manifold paint and it holds up well.


I'd heard this in the past.

I had my manifold surfaces trued and then the manifolds were tanked. As soon as I got them back, I used Eastwood's paint on them. When I started to run them on the car, it wasn't a month and I already had some surface rust in spots. Not even a year later, they're pretty much fully rusted again.