[b-man]

Wrapping them is probably the surest way to crack them.

Bead blast then prepare the surface with Metal Prep then brush off a couple of coats 24 hours apart of POR-15 factory manifold gray. Inexpensive and lasts a long time, best bang for the buck in manifold coatings.

The shelf life is easily decades as I’ve used an already opened can after sitting 20 years and only needed to thin it a little using mineral spirits, a pint of it goes a long way.

I recently did the log manifolds for my 421 HO and I’m trying it out in a VW merged competition header, I used just one coat on that.