Re: Fwd: [PSUBS-MAILIST] Paint.....Cheap or Proper?

["kocpnt tds.net" <kocpnt@tds.net>]

Hi Scott,

Just an Idea. When I did my sub I sprayed the entire thing with a
rather inexpensive rust inhibitive primer in white.

This helped me to see better and held back rust over the year and a
half of final construction.

After final completion,I then just blasted off the cheaper primer and
did the complete zinc and epoxy job.

Best Regards,

Jim K
On 5/9/12, swaters@waters-ks.com <swaters@waters-ks.com> wrote:
> Help,
>
> So as far as the painting goes, I might have made a mistake. On the
> inside it kept getting surface rust as I was working on it. I got sick of
> constantly cleaning it up so I sprayed it with XO Rust primer after I
> cleaned the whole thing with a wire wheel and then miniral spirits. Then I
> sprayed it with XO Rust machine gray. My resoning was to stop the surface
> rust as I was working on it, but now listing to you guys about what I should
> of done, I think I screwed up. What should I do? Is there a paint or
> something I could spray over the XO Rust to improve the durability? I
> haven't done any painting yet with the outside, so I'm in the clear there.
>
> Thanks,
> Scott Waters
>
>>
>> -------- Original Message --------
>> Subject: Fwd: [PSUBS-MAILIST] Paint.....Cheap or Proper?
>> From: JimToddPsub@aol.com
>> Date: Tue, May 08, 2012 8:44 am
>> To: personal_submersibles@psubs.org
>>
>> Some prior emails from last year's thread were missed.  Below are two from
>> Vance and Alec that are very significant.
>> -Jim
>>>
>>> ________________________________
>>> From: vbra676539@aol.com
>>> Reply-to: personal_submersibles@psubs.org
>>> To: personal_submersibles@psubs.org
>>> Sent: 3/21/2011 9:46:58 A.M. Central Daylight Time
>>> Subj: Re: [PSUBS-MAILIST] Paint.....Cheap or Proper?
>>>
>>> Jim and all,
>>>
>>> I agree about the use of best available coatings. On the exterior of
>>> Gamma and my K-350, I use a zinc coat on bare steel, hi-build epoxy over
>>> that as a strenghtening component and tie coat, and then polyurethane
>>> over that as the final coat. The polyurethane is able to take a harder
>>> whack without fracturing and doesn't chalk in the Florida sun. The
>>> combination is getting on toward bulletproof.
>>>
>>> If you want to do it up really well, there are Dimetcote vinyls
>>> available. Those are milspec Navy coatings. Expensive. $600+ per gallon,
>>> but it is really good stuff, as you might imagine. We used it by the
>>> truckload at Perry. But paint technology has advanced since then, so I
>>> don't know what the very best is these days.
>>>
>>> There are less expensive and labor intensive methods for the interior,
>>> however. Gamma's ABS specs for interior coatings call for Rustoleum over
>>> zinc, and that works very well. Nine years in storage and the coating
>>> only has a very few pinhole issues to show for it. That isn't a guess.
>>> I'm looking at it right now.
>>>
>>> The zinc undercoat is critical. After that, you want something that
>>> seals. That sounds patently obvious, but keep in mind that this stuff is
>>> slathered onto a pressure vessel that flexes under pressure, and works in
>>> a hostile environment. You skimp on it at your peril.
>>> Vance
>>>
>>>
>>> -----Original Message-----
>>> From: JimToddPsub <JimToddPsub@aol.com>
>>> To: personal_submersibles <personal_submersibles@psubs.org>
>>> Sent: Mon, Mar 21, 2011 10:30 am
>>> Subject: Re: [PSUBS-MAILIST] Paint.....Cheap or Proper?
>>>
>>> The last time I worked extensively with coatings was 1983.  We were
>>> using  two-part polyurethanes that cost $250 USD per gallon at that
>>> time.  Epoxies were considered older technologies that were becoming
>>> obsolete, however I think the term "epoxy" is being used generically to
>>> denote any type of two-part coating (color and catalyst or hardener).
>>>
>>> This is one of the last places I would try to save money, and I would
>>> spend just as much on interior primers and coatings as exterior for two
>>> reasons:
>>> 1.  Preventing corrosion is a lot better than trying to cure it, and
>>> having to do that (and redo) the inside the sub can be a bear.
>>> 2.  After an operation, I can wash down the exterior with fresh water and
>>> whatever else I chose to use. That's not an option with the interior.
>>>
>>> I've also wondered about spraying the entire exterior with a wax several
>>> hours prior to a mission but haven't investigated that. Seems reasonable.
>>>
>>> Jim
>>>
>>> In a message dated 3/21/2011 8:15:34 A.M. Central Daylight Time,
>>> Alec.Smyth@compuware.com writes:
>>>>
>>>> The first time I sandblasted and painted Snoopy, I put lots of coats of
>>>> expensive epoxy on the outside, but had this same exact thought about
>>>> the inside. That surely won't get wet, therefore cheap and
>>>> ordinary paint should do! Well, when Snoopy was in Florida the humidity
>>>> was 100%, the temperature was something ridiculous, and climbing in and
>>>> out even splashed a little salt water inside. With the combination of
>>>> those three factors, when I was being towed out to a dive site the
>>>> inside rusted so fast I could actually see the rust move. I mean that
>>>> literally, you could see it popping up from under the paint, rather like
>>>> a paper towel that has been laid over a counter that's sprinkled with
>>>> water.
>>>>
>>>> I still don't use as expensive a paint on the inside as the outside, but
>>>> one paint I've found is economical yet tough is a two part epoxy for
>>>> painting garage floors. It's very thick, giving really good coverage,
>>>> and resistant to abrasion. The downside is there aren't any rust
>>>> preventers in it because it's intended for concrete, so you want to
>>>> spray a base for metals underneath.
>>>>
>>>>
>>>> Best,
>>>>
>>>> Alec
>>>>
>>>>
>>>> The contents of this e-mail are intended for the named addressee only.
>>>> It contains information that may be confidential. Unless you are the
>>>> named addressee or an authorized designee, you may not copy or use it,
>>>> or disclose it to anyone else. If you received it in error please notify
>>>> us immediately and then destroy it.
>>>> From: owner-personal_submersibles@psubs.org
>>>> [mailto:owner-personal_submersibles@psubs.org] On Behalf Of James
>>>> Frankland
>>>> Sent: Monday, March 21, 2011 6:06 AM
>>>> To: personal_submersibles@psubs.org
>>>> Subject: [PSUBS-MAILIST] Paint.....Cheap or Proper?
>>>>
>>>> Hi All,
>>>>
>>>> Im going to paint the inside of my battery pods today.  As
>>>> theoretically, the insides should not get wet, i was thinking of using
>>>> just a normal metal paint like Hammerite or something.  A straight
>>>> forward paint that you would use to paint outdoor railings and things
>>>> with.  Do you think this will be ok or should i go for the "proper" 2
>>>> part epoxy marine primer?  Its just really expensive.
>>>>
>>>> What do you think?
>>>>
>>>> Thanks
>>>> James
>>>>
>>>>
>>>>
> ************************************************************************
> ************************************************************************
> ************************************************************************ The
> personal submersibles mailing list complies with the US Federal CAN-SPAM Act
> of 2003. Your email address appears in our database because either you, or
> someone you know, requested you receive messages from our organization. If
> you want to be removed from this mailing list simply click on the link below
> or send a blank email message to: removeme-personal_submersibles@psubs.org
> Removal of your email address from this mailing list occurs by an automated
> process and should be complete within five minutes of our server receiving
> your request. PSUBS.ORG PO Box 53 Weare, NH 03281 603-529-1100
> ************************************************************************
> ************************************************************************
> ************************************************************************



************************************************************************
************************************************************************
************************************************************************
The personal submersibles mailing list complies with the US Federal
CAN-SPAM Act of 2003.  Your email address appears in our database
because either you, or someone you know, requested you receive messages
from our organization.

If you want to be removed from this mailing list simply click on the
link below or send a blank email message to:
	removeme-personal_submersibles@psubs.org

Removal of your email address from this mailing list occurs by an
automated process and should be complete within five minutes of
our server receiving your request.

PSUBS.ORG
PO Box 53
Weare, NH  03281
603-529-1100
************************************************************************
************************************************************************
************************************************************************