Heritage restoration
Anti-corrosion restoration of heritage wrought iron and cast iron structures.
We restore the cast iron railings, wrought iron balcony railings, window grilles and gates of heritage buildings. We remove the rust and the layers of paint applied over the decades, then protect the steel for the long term with Thermal Spray Aluminium (TSA) and a paint system.
Featured projects
- Hungarian Parliament Building, Budapest (2015) – restoration of the cast iron railings along the Danube embankment, produced in Antal Oetl's foundry from the 1860s, with a 150–300 µm aluminium layer, under heritage supervision.
- Hofburg, Vienna, Heldenplatz (2021) – hand-forged window grilles weighing approx. 1 tonne each; the metal and paint layers together total 600–800 µm.
- Matild and Klotild Palaces, Budapest (2019) – restoration of wrought iron structures for an urban C5 environment.
Why aluminium metal spraying?
- In urban environments with exhaust fumes (C5), aluminium coatings outperform hot-dip zinc.
- No 450 °C heat exposure and no distortion – especially important for old castings and delicate forged ornaments.
- Cast iron and many old iron alloys cannot be hot-dip galvanized, but they can be protected by metal spraying.
- Every point of complex, intricate surfaces can be reached: we treat the parts on a rotating fixture.
How we work
- Grit blasting with corundum: the rust and old paint come off, and the steel regains its original colour.
- Aluminium metal spraying with Flame Spray or Arc Spray equipment.
- Priming, followed by a UV-resistant topcoat in the colour of your choice.
- Delivery and installation: the Hofburg window grilles were transported under a special route permit.
Frequently asked questions
Do you take the structure away, or work on site?
We usually treat it in our plant, then deliver it back and install it. If the structure cannot be moved, metal spraying can also be carried out on site, provided the technical conditions are in place.
Do you work under heritage supervision?
Yes, the restoration of the Parliament railings was carried out this way too.
What colour can it be painted?
Any colour. The metal-sprayed surface receives a primer and a UV-resistant topcoat, so the final appearance follows the wishes of the client or the heritage authority.
Why isn't repainting enough?
Rust keeps working under a new coat of paint. Complete cleaning and the aluminium layer protect the steel even beneath the paint, so the restoration lasts much longer.
Request a quote
Send us a photo of the structure and tell us its size, the number of pieces and the location.
Call: +36 30 9360 183E-mail: info@metalspray.hu