Is my railing real wrought iron?

Probably not. Most residential railings, security doors and window bars are ornamental steel: solid bar or hollow square tubing, welded and painted to look like traditional wrought iron. It matters because hollow tubing can rust from the inside and needs its own attention at joints and ends.

Can rust converter be used instead of removing rust?

It has a place on tight, stubborn rust in corners that cannot be cleaned back fully, used exactly as its label says. It is not a substitute for removing loose, flaking rust, which will lift whatever is applied over it. On most railings, mechanical cleaning followed by a rust-inhibiting primer is the dependable route.

Why is the concrete cracking around my railing posts?

Rust takes up more space than the steel it replaces. When a post rusts where it enters the concrete, the expanding rust can crack and lift the concrete around it. Painting cannot reverse that. If the post base is badly corroded, Ebenezer will tell you, because it may need metal or concrete repair first.

Should iron railings be sprayed or brushed?

Usually brushed, or painted with a painter's mitt on pickets, because spraying open metalwork sends much of the paint through the gaps and onto everything nearby. Spraying can make sense for a large run of fence that can be screened off. The choice is made per job, with your preference first.

Rusty Iron Railings: Prep and Paint

Iron railings, security doors and window bars at home are repainted to last by removing loose rust down to firm metal, priming the bare steel the same day with a rust-inhibiting primer, and finishing with an exterior enamel made for metal. The weak points are the bases where posts enter concrete, the welds and the hollow tubing, so those get the most attention.

Iron railings, security screen doors, window bars and side gates are part of the look of countless San Diego homes, from Spanish Revival houses in La Mesa to beach cottages in Imperial Beach. They are also where the first orange streaks appear on an otherwise sound exterior. Paint on metal does a different job from paint on stucco: it is not just color, it is the only thing between the steel and the air. Once it is breached, rust takes over.

Why does home metalwork rust where it does?

Rust needs steel, water and oxygen. It starts wherever the coating has been broken and water can sit.

Post bases. Where a railing post enters concrete or a planter wall, water collects in the joint. This is one of the most common failures on residential railings.
Welds. The weld bead is rough and the paint over it is thinner at the edges.
Horizontal rails. Water sits on the top surface after rain and sprinkler spray.
Pickets and their ends. Every picket has a top and bottom joint.
Hinges, latches and locks on gates and security doors, where moving parts wear the coating off.
Hollow tubing. Square tube can let water in at an open end or a pinhole, and rust from the inside out.

Near the coast, salt makes all of this happen sooner. What salt air does to paint and metal.

What does the rust tell you?

Light surface rust appears as orange bloom on the surface while the metal underneath is solid. This is the stage to catch it.

Flaking or scaling rust comes off in layers. The paint around it is lifting, and the metal is losing thickness.

Swollen, split or perforated metal means the steel itself is failing. Paint will not save it. Where that is the case, Ebenezer will say so plainly, because part of the railing may need a welder’s attention before it is painted.

Cracked concrete around a post means rust has expanded inside the joint. Rust takes up more room than steel, and it can break the concrete apart as it grows.

How iron is prepared and painted

Wash. Dirt, salt and old chalk come off first, and the metal is left to dry fully.
Remove loose rust and failed paint. Scrapers, wire brushes and abrasive pads take the surface back to firm metal and to old paint that is still well attached. On ornate work this is slow, careful hand work around every scroll and joint.
Feather the edges of the remaining paint so the repair does not show as a ridge.
Clean off the dust so the primer bonds to metal, not residue.
Prime bare steel the same day. A rust-inhibiting primer goes onto clean, dry metal before it has time to flash rust, which near the coast can begin within hours.
Seal the post bases. Where posts meet concrete, the joint is cleaned and sealed so water runs off rather than sitting against the steel.
Apply the finish. Usually two coats of an exterior enamel suited to metal. Both Dunn-Edwards and Sherwin-Williams make coatings designed to go directly on metal and to resist corrosion.

Step five is the one most often skipped on small spots, and a common reason rust returns.

Brush, mitt or spray?

Open metalwork is a poor target for a sprayer. Most of the paint passes through the gaps and drifts onto walls, windows, plants and cars. On railings and security doors, painting is usually done by brush, or with a painter’s mitt for pickets, which wraps paint around round and square bars evenly. A long run of fencing that can be screened off may be sprayed. The method is chosen per job, and your preference comes first.

Security doors and window bars

A security screen door is painted on both faces and all its edges, with the screen protected and the hinges, lock and closer masked. Window bars are painted in place, which means protecting the window, sill and stucco around each one. Both are fiddly and slow, and both are high-visibility parts of the house, so they deserve the same care as a front door.

Color and sheen on metal

Black, dark bronze and deep green are the traditional colors for iron and they hide minor imperfections well. Semi-gloss or gloss is usual, because a smoother, harder film sheds water better and feels smoother under the hand. Dark metal in full sun gets hot to the touch, so a railing that is held every day may be more comfortable in a slightly lighter color.

Caught early, metal is a small job

A railing with a few rust spots is a small repair. The same railing left for several more years can mean replacing a post or a section. That is why touching up chips as soon as you see them, especially near the coast, is the most useful maintenance a homeowner can do. And no job is too small: a single railing or gate is welcome on its own.

Ebenezer will look closely at every post base, weld and hinge with you and tell you exactly what he finds before he starts. More on exterior painting, or on homes in Imperial Beach and National City.

If orange streaks are showing up below your railings or windows, ask for a free estimate while the rust is still on the surface.