Re: Painting plywood questions
That checking is one of the main reasons that fibreglass sheathing is
done. I know that our Micro, which sits under a shade sail most of
the time, has checking on the plywood surfaces that are not sheathed,
but no checking where it is sheathed.
...but the other bits, well, I would just sand down and repaint. Of
course, the experts might suggest something more radical (and costly)
Greg F
done. I know that our Micro, which sits under a shade sail most of
the time, has checking on the plywood surfaces that are not sheathed,
but no checking where it is sheathed.
...but the other bits, well, I would just sand down and repaint. Of
course, the experts might suggest something more radical (and costly)
Greg F
--- Inbolger@yahoogroups.com, "bluebirdfitz" <bluebirdfitz@...> wrote:
>
> My recently purchased Black Skimmer look like she spent a few years
> without a good paint job. The plywood coaming and cabin sides are
are
> solid, but checked. What should/can I do to bring this wood back to
a
> smooth finish? Thanks for any help.
>
> John Fitz
>
--- Inbolger@yahoogroups.com, "bluebirdfitz" <bluebirdfitz@...> wrote:
This problem originates, at least in part, from the fact that most
plywood is rotary cut. A log is spun against a knife and the veneer
removed is then flattened in making the plywood. The stressed surface
is then ready to check if given the chance. That chance occurs when
the surface is exposed to the weather. It happened to me even when I
applied a couple of (thin) coats of epoxy. If even a thin fabric such
as cotton bed sheeting is added, the epoxy coating then seems to be
thick enough to resist the checking. Existing paint needs to be
removed. If possible, the epoxy should be applied to a warmed, but
cooling, surface. (You don't want the plywood to be out gassing when
you apply the epoxy or you will get bubbles. The fabric seems to allow
a thick enough layer of epoxy to prevent the checking we all want to
avoid. I've used cotton sheeting with good effect. Fiberglass would
also work. Always do your own experiments. Good luck Bruce.
>are
> My recently purchased Black Skimmer look like she spent a few years
> without a good paint job. The plywood coaming and cabin sides are
> solid, but checked. What should/can I do to bring this wood back toa
> smooth finish? Thanks for any help.There has been discussion on proper procedures for checked plywood.
>
> John Fitz
>
This problem originates, at least in part, from the fact that most
plywood is rotary cut. A log is spun against a knife and the veneer
removed is then flattened in making the plywood. The stressed surface
is then ready to check if given the chance. That chance occurs when
the surface is exposed to the weather. It happened to me even when I
applied a couple of (thin) coats of epoxy. If even a thin fabric such
as cotton bed sheeting is added, the epoxy coating then seems to be
thick enough to resist the checking. Existing paint needs to be
removed. If possible, the epoxy should be applied to a warmed, but
cooling, surface. (You don't want the plywood to be out gassing when
you apply the epoxy or you will get bubbles. The fabric seems to allow
a thick enough layer of epoxy to prevent the checking we all want to
avoid. I've used cotton sheeting with good effect. Fiberglass would
also work. Always do your own experiments. Good luck Bruce.
My recently purchased Black Skimmer look like she spent a few years
without a good paint job. The plywood coaming and cabin sides are are
solid, but checked. What should/can I do to bring this wood back to a
smooth finish? Thanks for any help.
John Fitz
without a good paint job. The plywood coaming and cabin sides are are
solid, but checked. What should/can I do to bring this wood back to a
smooth finish? Thanks for any help.
John Fitz