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Stocklin Iron Logo that reads "stocklin Iron" "santa Rosa, CA"

Stocklin Iron

Spiral Stairs
Iron Fabrication

Options for the Finish of your project

We offer a range of Finishes that vary on Durability, Lifetime, Sheen, and Price.

Stair with Shop Primer

Shop Primer

We suggest painting over this in shop finish. We include a primer paint job  in most of our  fabrication projects. This is offered in red or black. 

Powder coat Spiral Stair mounted on log cabin

Powder Coat*

This is a High Quality, smooth finish that is resilient to wear. Offered in many different colors and sheens. This finish can be slippery if wet.

Hot Dip Galvanized spiral


Paintable, high moisture resistance, dull grey finish that is gained through a high temperature process that changes the surface of the metal.

Black primer spiral stair


Red primer spiral stair


Shop Primer

Our Standard Primer is an Oil Based Spray on primer applied in our shop spray booth. A Finish paint job is necessary as primer is not a permanent finish. We suggest that the stair receives a top coat as soon as possible after installation.
Offered in either Red or Black.

Powder Coat*

We offer a variety of Powder coated Finishes in many different colors and sheens. This is a smooth finish which can be slippery if wet, so a grip tape is recommended for the steps. There is limited touch up or maintenance needed for this finish, and life expectancy is 25 years.

Some of the many colors we have installed a stair with includes blue, canary yellow, John Deer green, dark green, many different bronzes, satin black, white, and silver.
*Powder Coat Finish is only applicable in situations in which the stair does not need to be cut or reassembled for delivery or installation. All Powder coated stairs must be able to be installed in one piece.

NOTE: We do not offer texture, vein, or metallic style powder coating due to inability for repair and lack of color consistency.

Powder coated spiral stair
cream colored spiral stair
Black powdercoated spiral stair
White powdercoated spiral stair
Hot dip Galvanized spiral stair


In the Hot Dip Galvanization process, the product is dipped at 900 Degrees fahrenheit in a tub of zinc which penetrates the surface of the metal, creating a barrier against rust. This is a "rough to the touch" finish. When new it appears as a shiny silver, but over time dulls to a calm grey. This is also the most durable finish, resistant to heavy ware.
We suggest this finish for uses on or near a coastline, and in locations where the product will experience a high-moisture environment. It is suggested to be painted over for both an extra layer of protection, and to cover imperfections created during the finish process.

Rain Drops

Slippery when wet?

No matter the finish of your staircase or balcony, Stocklin Iron suggests using a non slip surface additive or supplement to prevent accidents and increase usage confidence. 

While we do offer alternative tread materials that may increase grip performance in certain situations, there are also products that can be applied to smooth plate treads that can help the longevity of your finish, as well as increase the traction of your steps during wet conditions. 

1: For stairs that receive a paint job after installation we suggest a grip increasing additive such as  crushed walnuts (environmentally safe) or other Non-Skid  paint additives that can be bought at most general hardware stores. 

Mix the additive into a small portion of the paint for your stair and apply to the walking surface of your treads and landing. You may also find that the areas which have this additive within the paint are more resistant to wear, and lasts better through heavy usage than non treated surfaces.

2:  For finishes that will not receive paint after installation, we suggest using grip/non skid tapes like those that can be found in commercial environments. We suggest that at least the front edge of the step (approximately 2 inches  deep for the entire  width of the step) receive a grip supplement. Some individuals have found that they can make patterns and designs using the tape, and cover the entire step with checkers, strips, or other geometrical designs. 

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