Painting aluminum binnacle.

[pandos]

I have corrosion on my binnacle and the adaptor plate on my radar scanner.

Both seem to have been powder coated and then assembled with stainless steel bolts..

What treatment is recommended?

The binnacle is fairly pitted, I was going to grind it back fill it with carfiller sand it and lash on some is isopon grey primer followed by some white gloss?

Should I do some chemical black magic prior to the above, or do something else entirely?

(I'll coat the SS screws with the yellow messy stuff which I can't recall the name of)

 

[Mister E]

You need an etch primer for aluminium.

 

[Momac]

 

[Poignard]

[...]

(I'll coat the SS screws with the yellow messy stuff which I can't recall the name of)

Duralac.

You'll be glad you used it if you, or a subsequent owner, have to dismantle any part of the binnacle.

ps The yellow messy Duralac is being replaced by a green messy Duralac.

 

[pandos]

You need an etch primer for aluminium.

I understood aluminium was fine once it aged a bit...( Or maybe that's galvanized steel!)

That special metal primer may be the job.

I used special plastics primer 10 years ago on plastic windows and they are still immaculate..

 

[Poignard]

About 25 years ago I had a new galvanised steel mast step made.

I wanted to paint it but I didn't know what paint to use.

I emailed the technical support team at International Paints for advice, and was given a detailed plan of what to use, and how to prepare the surface.

I followed the plan carefully, and the paint only began to show signs of lifting a couple of years ago.

It might pay the OP to contact International Paints for advice on painting his binnacle.

 

[rotrax]

You need an etch primer for aluminium.

Not necessarily. We have powder coated alluminium window frames. Stripping mechanicaly, wire brush in a dremel to followASAP then use Hammerite 'All Metals Primer' followed by a spray or brushing enamel of your choice. One window frame done like this is in its sixth year, no further deteriation. The Hammerite may, of course, have an 'etch' element, but it is not clear from the contents.

 

[Boathook]

When I stripped down my radar mount and rebuilt I used nylon washers between the s/s bolt and aluminium to try and reduce corrosion. I can't remember the paint I used but suspect hammerite. I really need to check its condition this year by going up the mast rather than using binoculars

 

[Mister E]

Not necessarily. We have powder coated alluminium window frames. Stripping mechanicaly, wire brush in a dremel to followASAP then use Hammerite 'All Metals Primer' followed by a spray or brushing enamel of your choice. One window frame done like this is in its sixth year, no further deteriation. The Hammerite may, of course, have an 'etch' element, but it is not clear from the contents.

Not necessary then the primer used may have an etch element. Not exactly a certain statement.
Normal primer may stick but companies have been spending extra for ages for a good reason.
The surface should be clean and free from corrosion to be spray painted.

 

[vyv_cox]

I have posted many times about the excellent results achieved by Hammerite Special Metals primer. I have used it for years on aluminium, galvanised steel and copper alloys for propellers and P-bracket. A superb product that has never failed for me.

Specifically for aluminium I prepared a base for my radar scanner when living in the Netherlands, so well before 2003. Hammerite primer with their smooth product on top. It has never been retouched and looks almost as good as the day it was assembled on the boat.

 

[pandos]

I think hammerite special metals primer followed by smoothrite is the way to go. Easy to get and use..

Thanks all...

 

[rogerthebodger]

I think hammerite special metals primer followed by smoothrite is the way to go. Easy to get and use..

Thanks all...

Thats how I finally painted the aluminium body of my anchor windlass, and it is still OK after over 15 years