Paint for post bases

[markharro]

I wonder if someone could help me with my issue - I need to finish these posts. As you can see plain steel ie non galvanised. I want to protect the steel but also produce a visual effect to mirror galvanising as we will have some other galvanised metal parts nearby. I had planned to use this Zinga product - https://www.promain.co.uk/zinga-96-zinc-cathodic-protection.html but spoke to their tech support and it is meant to go on bare steel so that would mean sand blasting the posts and thats not really an option. They suggested maybe using this spray to produce as an alternative sprayed on after I sandpaper the posts first of all - https://www.promain.co.uk/zinga-zingaspray.html 

 

Does anyone have any advice? Thanks 

[Roger440]

3 hours ago, markharro said:

I wonder if someone could help me with my issue - I need to finish these posts. As you can see plain steel ie non galvanised. I want to protect the steel but also produce a visual effect to mirror galvanising as we will have some other galvanised metal parts nearby. I had planned to use this Zinga product - https://www.promain.co.uk/zinga-96-zinc-cathodic-protection.html but spoke to their tech support and it is meant to go on bare steel so that would mean sand blasting the posts and thats not really an option. They suggested maybe using this spray to produce as an alternative sprayed on after I sandpaper the posts first of all - https://www.promain.co.uk/zinga-zingaspray.html 

 

Does anyone have any advice? Thanks 

Jotun do an epoxy which i think is suffixed AL. It has aluminium flakes in ut, is super drable and greyish silver in colour.

 

Check which version though, you need the one that is a topcoat is is UV stable.

 

I get mine from here: https://www.smlmarinepaints.co.uk/

 

Very helpful as are promain. You actually get to speak to a real person who has knowledge. Crazy, it will never catch on!

 

[JohnBishop]

On 11/06/2024 at 15:57, JohnMo said:

Good chance they are not actually galvanised, it could be just zinc electroplating (which us cheap rubbish and too thin). If it was galvanised you actually need an etching primer or an epoxy based Paint, to get the paint to stick on. But I would use Rust-Oleum® Stops Rust® Cold Galvanizing Compound Spray. Its 93% pure zinc coating applies a galvanized film with cathodic protection, which resists rusts, scratches and chips. It can go straight on zinc coating etc.

 

Apply 3 to 4 heavy coats. Nothing else needed.

 

Your stainless steel ones will rust if they used tools that were also used on carbon steel or have carbon steel grinding splatter on them or they used the wrong filler wire on the welds. Spray them in the cold galvanise spray also.

This Rust-Oleum galvanizing paint looks like is drying in minutes.
Do you know how much time between coats? I don't see it on the can.
On the website it says "To handle after 3 hours (at 20C)" so I would say 4h?

So far I painted all the bases and some items that rust and this does the job. The paint is pretty thick, dries quickly and leaves some exposed bits but it even protects those nearby areas like a rust repellent of some sort - I think this is this cathodic protection at play.
Without this stuff on the rust will pop up in some places even on stainless steel.

Edited March 6 by JohnBishop

[markc]

Yes it dries very quickly and you can re coat as soon as the colour changes, you could do one thick coat but then you just get heavy runs and sagging.