[PSUBS-MAILIST] Sand Blasting

[Alan via Personal_Submersibles]

David,
are you painting the hull yourself?
There is some advice below, but again I would sought your paint system
first & see if the method is compatible.
https://www.americandrystripping.com/protect-metal-abrasive-blasting/
recommends.....
For short-term surface protection — and to help paint adhesion — newly media blasted parts should be washed with metal prep — a dilute phosphoric acid solution available from auto parts stores as a painting preparation product under a variety of names.
Alan



> On 15/08/2018, at 11:09 AM, David Colombo via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> I was just thinking it would be bit less oily and sooty for working on if I had it cleaned. The primer was just a thought to slow down any flash rust while welding tabs etc.
> 
> Best Regards,
> David Colombo
> 
> 804 College Ave
> Santa Rosa, CA. 95404
> (707) 536-1424
> www.SeaQuestor.com
> 
> 
>> On Tue, Aug 14, 2018 at 2:34 PM, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>> David,
>> Some thoughts.
>> I would consult your sand blaster to see if he is going to have problems
>> getting in to the nose cone area. And also whoever is going to paint it
>> to check that the intended primer doesn't have a set time by which it needs
>> to have the next coat applied & that it is compatible with your intended marine
>> paint system. If they specialise in marine paint application they should be able 
>> to give you advise on when to prime.
>> I painted my sub with marine epoxy but had to buy specialised equipment
>> to apply the extra thick paint. Started to get expensive.
>> You may have a lot of attachment brackets you want to weld in for seats coms, scrubber, piping etc that you position at a later stage & that might burn your
>> external primer.
>> Another thought is that if you are getting it blasted professionally you don't
>> want to do it twice. You want them to do it once just before painting & clean
>> up around the welds for you.
>> Cheers Alan
>> 
>> 
>>> On 15/08/2018, at 5:19 AM, David Colombo via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>> 
>>> Hi Guys, I have a question on sandblasting my hull parts. The initial fabrication is almost complete and I was thinking that I might want to have the parts sand blasted prior to welding them all together. Maybe even a light primer seal coat to slow flash rust as it may be at the welders for a couple of weeks. Any thoughts or advice would be appreciated. I know right now every time I get near the parts I'm covered in black smudges.
>>> 
>>> 
>>> Best Regards,
>>> David Colombo
>>> 
>>> 804 College Ave
>>> Santa Rosa, CA. 95404
>>> (707) 536-1424
>>> www.SeaQuestor.com
>>> 
>>> _______________________________________________
>>> Personal_Submersibles mailing list
>>> Personal_Submersibles at psubs.org
>>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>> 
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