"Painting cast iron fountains, Restoring rusty fountains"

A. When coating cast-iron fountains it is always best to first blast-clean the metalwork and then apply a coat of Zinga, which is a one-component pure zinc coating. It will be rock hard in around one hour and will normally sit there for 30 years, because this coating literally galvanises the steelwork.
You can then seal the zinc layer with an epoxy sealer like Intergard 269 and then apply your aesthetic colour-coat.

People's Park in Dublin: before and after

I have used this system on public fountains and always with great success, giving written guarantees for 25 years.

A. The best thing to do is have it sand blasted, Then a heavy primer. Paint it right after its blasted, it will rust up on you real quick.

A. Another alternative is as follows. Use a hand or power wire brush to remove the loose rust. Check for a Rust Converter [affil. link to info/product on Amazon] (spray or brush type). Coat according to instructions on the converter and then paint with an appropriate top coat. This stuff works very well and actually turns the rust into an oxide that seals the metal surface from further rusting. Not very expensive either. I use the Mar-Hyde brand and have excellent results. Hope this helps.

A. Try cathodic protection. Good luck and hope it helps!

A. First, no coating is going to be absolutely foolproof, because humans apply it. No disrespect intended. My choice would be a fiberglass resin, with no mat. One with a white tint should work well, based on your pictures. I would use two or preferably 3 coats, with the last one containing wax. Good fiberglass sources can easily set you up with this. Wearing an activated carbon respirator would be a good idea also.

A. I install steel cisterns for rainwater catchment. We use a product called 'Blue Max' by Ames Research.
It is really easy to use and we've had great results. We've been using it for at least 2 years now and have not had any leaking systems.

A. I am in the coatings business. A product that will fix your problem is Vortex Applied Coatings.

Hi. We appreciate the responses from everyone who has tried to help, but this site discourages suggesting of brand names ( huh? why?). Thanks!

I think Goran offered good food for thought with his posting about cathodic protection. You won't see a ship or a nuclear containment structure or even a water heater without zinc (or other sacrificial metal) anodes, so it may be the simplest way forward for amateurs and home installations.

Regards,

A. Hi Andrew. I think the epoxy primer would be okay, as would fiberglass products whether epoxy or polyester based, as would the proprietary products mentioned -- but I agree with Goran's earlier posting, and feel that magnesium anodes are a big part of the right answer.

I think you would find sand blasting much faster and easier than grinding. Good luck.

Regards,

A. Electrolysis. Followed by drying completely and rubbing beeswax into the metal. It will turn a beautiful slightly glossy black.

I think you could submerge the whole thing by building a wooden tank around it somehow.

-Not an Expert.

A. Hi Christine. There are probably 3 approaches to slowing the rusting.

1. Purer water, lower in chlorides and sulphates, and less conductive. Drain the fountain, and use only distilled water or rain water in the fountain. If fertilizer, de-icer or anything else gets in the fountain, drain it and refill.
2. Sacrificial protection. Put a magnesium anode from a boating store or plumbing supply store in the water, firmly connected to the steel that the fountain is made of. Replace the anode periodically.
3. Coating the steel with paint to retard the rust. I don't know how this suits your aesthetic taste, but painting after a phosphoric acid (rust converter) treatment will greatly slow the corrosion.

I'd do all three. If it suits you to paint it the color of zinc with a "cold galvanizing compound", that would probably provide 2 & 3 simultaneously. Good luck.

Regards,

A. Hi again. Yes, rust converter and paint will get rid of the rust, but it will then be painted rather than raw metal. I don't know if that suits your wishes. And the repair will have a limited life before touchup is required; I don't know how long.

Regards,

A. Hi Christine. Best of luck with it. I've already told you three things that I think could be done now, but sorry, I'm not getting into after-the-fact "should haves" and contract disputes.

Regards,