Painting old galvanised steel

[blackrose]

I've got an old partially corroded galvanised bucket that I want to paint for keeping kindling in. Most of the galvanised coating seems to have gone, so if I abrade it and give it a good key do I need to use a specialised paint for galvanised steel like this, or can I use ordinary Hammerite, or should I just use a good metal primer such as Bonda Primer (alkyd resin based) + undercoat & topcoats?

https://www.hammerite.co.uk/product/direct-to-galvanised-metal-paint/

Since the bucket has already started to corrode lightly in places, I'm thinking that the direct to galvanised paint (for non-rusting surfaces) wouldn't be appropriate?

Edited January 20, 2018 by blackrose

[David Mack]

New galvanising has to be allowed time to weather or you have to use a special etch preparation before painting it. No such problem with old galvanising. So I would just use a good primer over the whole thing.

[beerbeerbeerbeerbeer]

Book it into a dry dock and give it a couple of coats of bitumen. 

 

[blackrose]

2 hours ago, David Mack said:

New galvanising has to be allowed time to weather or you have to use a special etch preparation before painting it. No such problem with old galvanising. So I would just use a good primer over the whole thing.

Thanks

[Murflynn]

14 hours ago, Goliath said:

Book it into a dry dock and give it a couple of coats of bitumen. 

 

...............or buy a new bucket and paint it black............................  old buckets have to be done in dry dock, but a new one can be blacked on the hard before launching.

[Momac]

Do nothing. The naturally weathered and aged / slightly corroded look may be considered by some to be attractive.

 

.

[Guest]

26 minutes ago, MartynG said:

Do nothing. The naturally weathered and aged / slightly corroded look may be considered by some to be attractive.

 

.

A rat rod bucket?

[monkeyhanger]

21 hours ago, David Mack said:

New galvanising has to be allowed time to weather or you have to use a special etch preparation before painting it. No such problem with old galvanising. So I would just use a good primer over the whole thing.

I would use etching primer on the galvanised part and rust killer on the rest. Then give it a coat of Bonda primer before applying your undercoat and finish coats.Paint doesn't like to stick to galvanised coating. I you take a chance and omit the etching primer, you will quite possibly find that you have to go back to square one in a couple of months.

[blackrose]

2 hours ago, MartynG said:

Do nothing. The naturally weathered and aged / slightly corroded look may be considered by some to be attractive.

 

.

Unfortunately not by me and since it's going in my boat it will need to be painted.

[blackrose]

1 hour ago, monkeyhanger said:

I would use etching primer on the galvanised part and rust killer on the rest. Then give it a coat of Bonda primer before applying your undercoat and finish coats.Paint doesn't like to stick to galvanised coating. I you take a chance and omit the etching primer, you will quite possibly find that you have to go back to square one in a couple of months.

Well it's not easy to define where the galvanised stops and the rust starts so it's going to need the same treatment over the whole surface. I've got a bit of Jotamastic 87 epoxy left over so I think I'll use a coat of that and then a coat of Hemple primer/undercoat which I also have in the paint locker. Then I'll just use a topcoat of whatever I happen to have. I've got some Hammerite and could just use a couple of coats instead of primer/undercoat/topcoat, but I always find Hammerite cracks and flakes off after a while.   

Edited January 21, 2018 by blackrose

[Guest]

24 minutes ago, blackrose said:

Well it's not easy to define where the galvanised stops and the rust starts so it's going to need the same treatment over the whole surface. I've got a bit of Jotamastic 87 epoxy left over so I think I'll use a coat of that and then a coat of Hemple primer/undercoat which I also have in the paint locker. Then I'll just use a topcoat of whatever I happen to have. I've got some Hammerite and could just use a couple of coats instead of primer/undercoat/topcoat, but I always find Hammerite cracks and flakes off after a while.   

2

Never had much luck with it myself. Used to be really good back in the '70's when you could roller it on. I think it was made by Finnigan's in those days.

[Murflynn]

8 hours ago, catweasel said:

A rat rod bucket?

you bin watching Dave Channel?

that guy would charge $5,000 and take a wet week to polish the corroded steel and then give it a clear coat.