Aluminum Primer Type

Itsalonestar

Seaman Apprentice
Joined
Aug 15, 2010
Messages
37
Re: Aluminum Primer Type

OK....done cracking up....well almost......

That's kinda my point in a roundabout way...looks like the people who do this in a controlled environment with superior materials have their own share of problems with aluminum coatings. I noticed this morning that the makers of Ospho give no information about aluminum on their label. Only plain and galvanized steel. A major European supplier of coatings for commercial stuff like tanks, oil rigs, ships, etc., lists aluminum as a candidate for their coatings, but only gives application notes for...you guessed it.....steel. Still waiting for a replay on that from Belgium. I'm thinking this is all probably due to lawyers rather than a desire to be forthcoming, but I'm kinda cynical that way. :)

Being adventurous and little to lose, I have committed to a proprietary mix based solely on the recommendations of the guy who mixes it. If it turns out I can combine the benefits of Gluv It, primer and topcoat (however unlikely)
into one operation, Cool Beans! If not...well, so what. The boat and 3 motors that came with it are likely worth more per pound as scrap. There may well be a larger craft in my future with a more critical purpose, so what people smarter than me have to say about it is well worth hearing and taking note of. The devil in is the details, information is power, and often money in the bank.

I'm very much a student of conventional wisdom and established practice, but always mindful that its backward cousin "We've Always Done It That Way" does occasionally stand in the way of progress and innovation.

Any major supplier who has stood the test of time, customer complaints, lawsuits, government regulation and all the other crapola a business has to tolerate to stay afloat should be able to supply the right stuff to paint a john boat. Seems like RustOleum is a qualified contender. I should probably go buy some myself. That would satisfy the answer to the "What" question, but it really wouldn't do much for "Why," and that's the kind of stuff that can keep you awake at night. :)


Hey folks seems to me like a simple project just went waaaaay technical and dropped anchor for some of us simple minded kinda folks.

So if you want to recoat a 10'-14' aluminum craft jon or other wise, how does anyone recommend getting it done with out having to flash an "A&P" Certificate or be a NASA coatings technician?

For a part time fishing/duck hunting craft, I'm liking the rust-oleum self etching primer and a marine top coat or something like that.

Just curious!

rz
 

croag

Cadet
Joined
Aug 10, 2010
Messages
21
Re: Aluminum Primer Type

Croag, I am with Bouymarker - as an aircraft mechanic I can tell you there is only one way to do the job, it may cost a little more but the result will last langer. Lightly sand the surface with aluminum oxide paper, acid etch, alodine and use a two part epoxy primer then paint as desired.

One thing that would concern me if we weren't talking about a 12 ft boat is the fact that you used a wire wheel. You should never use steel wired brushes on aluminum as small particles of the steel can become embeded in the aluminum and cause corrosion when placed in the precence of a weak electolyte such as salt water or lake water. Just saying for future knowledge.

Skydrol - I appreciate this and am a bit freaked out now! Can I advert potential corrosion issues by prepping it REALLY well w/ alumiprep etc?

Also - here is what the outside looks like at the moment....is this thing ready for the self etching primer (after cleaning) or do i have to get every little piece of pain and oxidation off? I've got most of it gone, the only outstanding items are small 1" squares around some of the rivets







If this is good to go, I'm going to prep, then Herculiner the bottom & paint the rest with duck boat paint from cabella's

Thoughts???
 

Woodonglass

Supreme Mariner
Joined
Dec 29, 2009
Messages
25,929
Re: Aluminum Primer Type

I' m with RZ and back to my original post. Rusoleum Self Etching primer and Rusoleum Professional Paint thinned with 10% penetrol Sprayed with a HVLP and you are good to go. To much thinking for me. Plenty of guys on here have used this application and have been using their boats for YEARS with GREAT success.

I'm just sayin...:D
 

Yacht Dr.

Vice Admiral
Joined
Feb 26, 2005
Messages
5,581
Re: Aluminum Primer Type

Hello m8s..

I dont know anything about this Rusto stuff.. but I can tell you that IMO you Should prep your Alum the pro way...

Alumiprep .. alodine.. zinc chromate ( not zinc on drives ). Then prime..

I only give you the Pro way.. this way may be more $ .. but Im only here to give you the most expensive and trade way to do things..

Your topcoat is...well .. lets say to each his own.. I only use top end paints...

However You dont have to put your name or warrantee on these projects... I DO ...

I will continue to post Only pro ways..

YD.
 

Woodonglass

Supreme Mariner
Joined
Dec 29, 2009
Messages
25,929
Re: Aluminum Primer Type

YD is right.

But there are Three Ways to do things.

First is The PRO or absolute RIGHT Way, THE second way is the Shade Tree DIY way that multiple others in the past have done and had good success. And the third way is the WRONG WAY. I would pick one of the first two.


I'm just sayin...:D

PS. YD we will NOT sue you if we follow your advice and it fails.
 

skydrol

Cadet
Joined
Aug 1, 2010
Messages
13
Re: Aluminum Primer Type

Croag,

Sorry, I didn't mean to freak you out. I was just trying to impart a bit of knowledge to help you out in the future. I have no doubt that your boat will be ok for a long time to come. With a small bass boat, if I was on a tight budget I'd take the chance with some rattle can and call it a day and go fishing. I would however keep my eye on it over time and treat any surface corrosion spots that may appear while doing routine maintenance. Trust me you're not the first one to use a wire wheel on aluminum, but like most you'll probably move up to a bigger vessel and you'll have the knowledge to tackle the job again.

Sometimes as aircraft mechanics we use the saying "I'd fly in it" (and mechanics don't typically like to fly), well in your case I'd go fishing in it. We also have another saying that corresponds to boats very well, Do you want it done cheap, fast or right, and you can only choose two of the three.

As far as the guy who wants to use a steel bracket in his boat, if we are still talking about a jon boat then I say paint the steel and mount it with cadmium plated fasteners. Paint is as good a barrier as any and the cadmium plating will act as the sacrificial metal. Just inspect it during regular maintenance and correct any issues as they arise.

My thoughts are just the ramblings of an airframe and powerplant mechanic who just got back into boating after a few years off. Maybe one of the marine mechanics can chime in some more.
 

Gypsystar17

Cadet
Joined
Apr 10, 2010
Messages
24
Re: Aluminum Primer Type

I used automotive self etching primer on my springbok aluminum 6 years ago,neverhad a problem since,sticks real good
 

kcash

Recruit
Joined
Aug 13, 2010
Messages
4
Re: Aluminum Primer Type

Rust oleum makes a can of aluminum primer that works pretty damn good, its a latex base so you have to prep your surface well, but it dries quick and the aluminum paint I put on top of it is holding fast and looks good.
 

kcash

Recruit
Joined
Aug 13, 2010
Messages
4
Re: Aluminum Primer Type

let me clarify, that is PINT can of primer, that you roll on, foam rollers give you the best looking surface, but you can brush it on too.
 
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