If you want to prime it first, latex is fine or oil base by itself. You can probably get by with latex directly on the pipe, but there may be oils or dirt on it that will bleed through.
Galvanized pipe for water and drain lines. Cast iron pipe for main drain lines.
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Paint can protect iron from rusting, especially if it is the right kind of paint - you would not want to use a water based acrylic paint, since the water in the paint would promote rusting, rather than preventing it.
The cast of A New Kind of Paint - 2007 includes: Heidi Goar
Cast Iron.
there are high heat paints you can buy in almost any major hardware type store Canadian tire for sure (in Canada) and probably Home Depot / Lowes
Cast iron
Black or white are traditional colours for iron beds, with or without brass accents. However the coolest iron bed I ever saw was painted high-gloss, fire-engine red, now that had impact. Truth is you can paint it any colour you would like, just be sure you use the right kind of paint for the project.
The metal free weights are made from cast iron.
Cast iron door stops work best for highly decorated and carved doors. This is because cast iron door stops are often decorations to build off of the already decorated door.
what kind of paint does O'Keeffe use
Nearly all piano harps are made of cast iron.