Re: Bottom paint removal problem

Justin Paulsen

Hi Mark,

I wasn't aware of soda blasting so thanks for the new info!  The equipment looks fairly cheap as does the blasting soda.  Maybe you could just do it yourself if the yard allows it?  You would need a way to contain the dust and old bottom paint being blasted off but heavy plastic or cloth drop cloths should work for that.

Thank you,
Hopeful future SM/SM2k owner

On Tue, Feb 25, 2020 at 1:28 PM Mark Pitt <mark_pitt@...> wrote:
I have owned my Super Maramu since she was launched in 2003.  Amel applied a hard bottom paint before launch in 2003 but since then I have only used ablative paint.  The layer is now thick and a bit uneven.  Having carefully examined the words of caution on the Amel owners group, particularly those of Joel Potter, I have looked in vain for a soda blaster to remove all the old bottom paint. I just cannot find one in Rhode Island.  The contractor recommended by my Rhode Island marina uses glass and is apparently very experienced with blasting boat bottoms. 

Last week I contacted the large Hinckley repair yard in Portsmouth, RI and it turns out that they do not have access to soda blasting either and use the same glass blasting contractor used by the full service marina where Sabbatical III is stored.  Hinckley recommends the glass blasting followed by 5 coats of epoxy (the 5 coats is their rule for European boats).  My yard has suggested 3 coats of epoxy as a water barrier.
I had been hoping for soda blasting plus a single coat of epoxy as a primer, on the assumption that the barrier coat under the gel coat would remain intact.  I did not expect that it would not be possible to find a soda blasting contractor in Rhode Island (or nearby Massachusetts) who works on boat hulls.
Any suggestions for me?  I feel stuck and am inclined to use glass blasting following by 3 or more coats of epoxy as a barrier coat.
Mark Pitt
“Sabbatical III”, SM#419, Wickford, Rhode Island, USA

Justin Paulsen
IT Professional

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