Fred,
Just sand it to where there is no shiny material left. You shouldn't
have to sand into the glass to worry about degrading the material but
even if you get into it a bit you are about to place 2 more layers on
top of it. The scuff sanding is just so the epoxy holds.
Jeff
A258
Priming & sanding it off again looking for that perfect finish. Now I
remember why I use to hate doing drywall!
On Oct 14, 2004, at 4:42 PM, Fred R. Klein wrote:
> <fklein@orcasonline.com>
>
> Hi All,
>
> On the subject of "scuff sanding"...particularly in relation to
> preparation
> for the 2" wide reinforcement tapes between the wing spar and
> skins...I've
> read thru the manual as well as the matronics search without finding
> any
> info which seemed relevant.
>
> My concern is my uncertainty as to what constitutes adequate "scuff
> sanding"
> in order to achieve required bonding.
>
> As I sand the areas of the skins where the 2" reinf. tapes go, I note
> that
> because of the weave of the glass on the skins, a pattern developes
> with the
> high areas becoming whitish matte and the low areas remaining darker
> and
> somewhat glossy; my fear is that if I continue sanding so that the area
> becomes 100% "whitish matte", I will remove too much material and
> degrade
> the strength value of the existing glass skins.
>
> I'd be grateful to learn whether or not a consensus has been reached
> on this
> issue as well as any individual comments from "those who have gone
> before"
> me.
>
> Fred
> A194
>
>
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