[PSUBS-MAILIST] K-600 has been blasted

[David Colombo via Personal_Submersibles]

Jon, How did you dispose of 3000# (30 c/f) of sand with the paint mixed?

Best Regards,
David Colombo

804 College Ave
Santa Rosa, CA. 95404
(707) 536-1424
www.SeaQuestor.com



On Mon, Apr 10, 2023 at 11:03 AM Jon Wallace via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Hi Sean, the overriding guide for the media was...I want to do this ONCE,
> and fast.  So I needed something that would be a good candidate to
> penetrate both the paint and corrosion thoroughly.  The compressor was
> $200/day plus fuel, so I didn't want to risk experimenting and wasting a
> day or two.  Plus, we were also fighting Mother Nature's springtime weather
> where rain delays were also a possibility.  So a product that would do the
> job the first time was a necessity for me and the recommendation that came
> back was silica sand.  I think coal slag ("black beauty") could have been
> another option but the spent sand fit into the local environment a bit
> better than coal slag would have.
>
> Jon
>
>
>
> On Monday, April 10, 2023 at 10:05:26 AM EDT, Sean T. Stevenson via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> I think your choice of blasting media makes a big difference, both due to
> hardness of the media, and particle size and sharpness. I see that you used
> silica - what guided that decision, and what were your options there?
>
> Sean
>
> -------- Original Message --------
> On Apr. 10, 2023, 07:29, Jon Wallace via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
>
> Couple of updates.  I pulled the 600 down to Florida and have it here with
> me now.  End of May it will follow me back to NH for the summer.  It tows
> straight as an arrow and completely stable.  I couldn't ask for a better
> trailer in that respect.
>
> I am going to write a "white paper" on my sandblasting/painting experience
> and am also working on a video documenting the process.  In the meantime I
> can tell you that it cost me $1535 total for supplies and rented
> equipment.  Dan had a lot of other necessary equipment and supplies on site
> and available, so the true cost is even more had I needed to rent or
> purchase those things.
>
> Compressor, 375 cfm, 10 hours - $400
> Diesel Fuel, 10 hours, 24 gallons - $125
> Silica Sand, 3000 pounds - $300
> Macropoxy-646, 1 gallon A, 1 gallon B - $240
> Sher-Loxane 800, 1 gallon A, 1 quart B - $234
> Paint supplies - $236  (brushes, rollers, overalls, gloves, etc)
>
> I am still undecided if I would sandblast again or just hire it out.  It
> doesn't look like a big deal when you watch someone do it, but I found it
> extremely physically taxing work and my body reminded me later at night
> that I am not a young man anymore.  For what it's worth, we did try
> pressure washer sandblasting first and while it worked well removing paint
> but it wasn't powerful enough to get out the worst of the corrosion that
> was present.  After experiencing pressure washer vs AIR, air wins hands
> down.  No comparison.
>
> Jon
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