The last time that I stripped the bottom to the barrier coat I used my
household pressure washer and a "Turbo" nozzle. It removed the Micron
CSC in a very well defined and complete fashion. Very little post
preparation was required before I put on the new Micron CSC.
Neil Schiller
1970 Redwing 35, Hull #7
(C&C 35, Mark I)
"Corsair"
On the schedule for haul out before the water gets too low to make it up
the river.
On 9/6/2012 1:36 PM, dwight veinot wrote:
Bob
I was not recommending you use high pressure water; just pointing out
that high pressure water can be used to strip paint in response to
another lister who said pressure washing would not do the job...which
is true for most household pressure washers that develop around 2000
psi and those powered by small gas engines like the boat yards
use...in fact high pressure water can be used to cut steel. I saw it
used to cut through 1 inch thick submarine steel all the way around
the circumference...and when stripping paint the pressure can be tuned
to be gentle on underlying substrate but still remove the antifouling
paint...but with quite a bit of water run off which usually is an
environmental problem in most yards nowadays.
I used methylene chloride based gel paint stripper to do my C&C 27
some years ago. The secret is to have a very good paint scraper to
use after the methylene chloride stripper sits on the paint for about
15 minutes and causes the paint to bubble...you need a scraper that
will stay sharp and the cheap ones don't so if you use them you spend
a lot of time sharpening or changing blades...Lee Valley Tools have
some quality paint scarpers for about $30-40. After removing just
about everything with the stripper and scraper I went over the bottom
with a belt sander 60-100 grit and then wiped clean with solvent.
Basically my feeling is there is no easy way if you do it yourself.
It is much easier to hire someone else and stand back and
watch...even if you just hire some one to use your quality paint scraper.
Dwight Veinot
C&C 35 MKII, Alianna
Head of St. Margaret's Bay, NS
------------------------------------------------------------------------
*From:*cnc-list-boun...@cnc-list.com
[mailto:cnc-list-boun...@cnc-list.com] *On Behalf Of *Bob Hickson
*Sent:* September 6, 2012 1:59 PM
*To:* cnc-list@cnc-list.com
*Subject:* Stus-List Antifouling removal - chemical strippers
Thanks to everyone for your feedback / suggestions.
I do not think that a pressure wash (high pressure) will work well on
antifouling without damage to the gel coat.
My boats have always been pressure washed in the fall by the yard
after haul out and this certainly does not remove the bottom paint.
Higher pressure might work but at the expense of the gel coat.
I power sanded the bottom of my previous boat (Viking 28) and I am not
anxious to repeat this experience on the 29. I had to sand the
previous boat in mid winter because it had VC Tar under the paint and
this cannot be sanded unless it is cold (it smears and blinds the
sandpaper in warmer weather).
I have a quote of $1,800 to soda blast the 29-2 .... seems pretty high.
Have a second quote for $600 from a contactor that is going to use a
wet sand blasting approach with very fine sand. I am a bit leary of
this approach since I hear that you can do extensive damage to the gel
coat / fiberglass by using sand. The sand is reportedly too aggressive.
I am waiting for a quote from a contractor that can do dry ice
blasting ... this sounds like a great approach since there is no
blasting media to clean up. Will let you know what his price is.
So far nobody has said very much about chemical strippers.
I would like to know a bit more before I make a decision.
The Franmar website has an interesting video (second link) about using
their product "Soy Strip"
http://www.franmar.com/industries/marine-boating.html
http://www.franmar.com/videos/43-product-videos-bottom-boat-antifouling-paint-removal-soy-gel.html
Was hoping for some firsthand feedback on this product or other
chemical strippers.
Looks like a choice between dry ice blasting or Soy Strip at this point
Best regards,
*Bob Hickson, P. Eng, RHI, CEA*
*/C&C 29-2 Flying Colours/*
*(416) 919-2297*
*bobhick...@rogers.com <mailto:bobhick...@rogers.com>*
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