Chuck:
I have no first hand experience with either soda or walnut blasting. I
did however have the bottom of my boat 'dry ice blasted' to remove the
antifouling paint down to the gelcoat.
Dry ice blasting is a very quick, clean and effective method to strip
bottom paint. Perhaps another option if there is anyone in your area
that does it.
Rob Abbott
AZURA
C&C 32 - 84
Halifax, N.S.
On 2015-12-23 10:47 AM, Chuck Gilchrest via CnC-List wrote:
Hi Danny,
Can I ask who did the walnut stripping on your boat and at which
yard? I’m having my “new” 1983 Landfall 35 brought down from the
North Shore of Mass to the South Coast in early January and the bottom
paint is flaking off in chunks, revealing the shiny original gel coat
underneath in most places. I would say that the paint over shiny gel
coat method was not terribly effective for adhesion.
Speaking to the service manager at Concordia about soda blasting, he
tells me that the soda medium leaves a very rough finish on the bottom
that takes a significant amount of labor to prep the bottom afterwards
to allow bottom paint go on nice and smooth. Perhaps he was also
implying that the boat should have a barrier coat added as well…
either way, with soda blasting and subsequent bottom prep, we were
talking in excess of $5000.
With that info, I had planned to chip off as much of the old paint
as possible, sand down the rest using and orbital sander with a vacuum
attachment, leaving just enough “tooth” on the gel coat hull surface
to repaint. It would be a lot of work, but I could do it in my yard
and build my upper body strength at the same time!
However, the walnut shell medium sounds like it may be the ticket if
it is less invasive to the gel coat than soda blast and if I basically
want to start with a blank canvas of a hull to prep and paint. Would
love to hear from others that have used the walnut shell method and
what they’ve done to prep afterwards.
Best,
Chuck Gilchrest
S/V Half Magic
1975 25 Mk 1
S/V Orion
1983 Landfall 35
Padanaram, MA
_______________________________________________
Email address:
CnC-List@cnc-list.com
To change your list preferences, including unsubscribing -- go to the bottom of
page at:
http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com
