[PSUBS-MAILIST] K-600 has been blasted

Mon Apr 10 14:02:37 EDT 2023

 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 - $400Diesel Fuel, 10 hours, 24 gallons - $125Silica Sand, 3000 pounds - $300Macropoxy-646, 1 gallon A, 1 gallon B - $240Sher-Loxane 800, 1 gallon A, 1 quart B - $234Paint 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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