<html><body><span style="font-family:Verdana; color:#000000; font-size:10pt;"><div>I did all my own sand blasting. You can see how I did it in my project pictures. After messing around with different sand blasters and different media I learned how to do it quick and easy with minimal dirty work. The long and the short of it is do not use a cheapy DIY sand blaster (the kind that looks like a little suit case). If you do, you will spend weeks trying to sand blast your sub. Get a Cleamco 3/4" high volume siphon type and rent a towable 180 CFM compressor. I did my whole submarine inside and out in 3 hours (including all the small parts). Use 80 grit coal slag (DO NOT USE SAND!!!). Get a air feed hood which works better than a respirator with the cheapy hood. This process is all about having the right tools. Also be sure you tape off / protect with cardboard, the critical parts that you don't want to blast. Blasting takes a smooth surface and makes it rough which is perfect for paint to anchor on too, but bad for seals and such.</div>
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<div>When you are done, vacuum out the sub and wipe it down with solvent then move it to a paint booth. Wipe it down again, paint, and be happy :)</div>
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<div>Thanks,</div>
<div>Scott Waters </div>
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<DIV id=wmQuoteWrapper>-------- Original Message --------<BR>Subject: Re: [PSUBS-MAILIST] Zinc coating<BR>From: Alec Smyth via Personal_Submersibles<BR><<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><BR>Date: Fri, May 01, 2015 6:14 am<BR>To: Personal Submersibles General Discussion<BR><<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><BR><BR>
<DIV dir=ltr>Hi Brian,
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<DIV>There's lots of dirty, noisy, or smelly jobs building a sub, but sandblasting our little hulls - in particular the inside - has to be right at the top of the list. Years ago I bought myself a sand blaster with the intention of doing this job myself. Very bad idea. It was a complete pain, especially recovering the sand to pass it back through, which required one to pass it through a sieve to remove any kind of foreign particles that would clog the nozzle. I had clogs pretty much all the time, sand everywhere, and ended up taking the sub off to have someone with proper facilities deal with it. I generally tight-fisted, but sand blasting is THE job I don't mind outsourcing.</DIV>
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<DIV>Best,</DIV>
<DIV><BR>Alec</DIV></DIV>
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<DIV class=gmail_quote>On Thu, Apr 30, 2015 at 9:25 PM, Brian Cox via Personal_Submersibles <SPAN dir=ltr><<A href="mailto:personal_submersibles@psubs.org" target=_blank>personal_submersibles@psubs.org</A>></SPAN> wrote:<BR>
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<DIV>All,</DIV>
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<DIV>Ok, I was going to take my pressure hull ( it's finished , BTW) down and have an outfit zinc coat it but now I'm thinking that I should spend that money on a heavy duty air compressor and a sand blaster and do it myself. Since I'm sure I will need to be recoating places where I'm doing thru hulls and such. But my question is do I need to worry about the compatibility between the zinc coating and the epoxy that will on over the zinc ?? Should I put the zinc on the inside too ? Are there different types of zinc coatings? </DIV><SPAN class=HOEnZb><FONT color=#888888>
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<DIV>Brian</DIV></FONT></SPAN></DIV><BR>_______________________________________________<BR>Personal_Submersibles mailing list<BR><A href="mailto:Personal_Submersibles@psubs.org" target=_blank>Personal_Submersibles@psubs.org</A><BR><A href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target=_blank>http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</A><BR><BR></BLOCKQUOTE></DIV><BR></DIV>
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