On 10-Nov-2004, (Melanie) wrote:

Firstly, onto
which material could I place the fiberglass (with resin mixture) to
dry without it bonding to it?

You can use plastic sheets, but have to be careful which plastic you
choose. Polypropylene and polyethylene will be good, polyester (Mylar)
will stick. Alternatively, you could use a smooth surface that is
coated with a release material like PVA - polyvinyl alcohol (not
polyvinyl acetate).

Secondly, how can I manipulate the
translucency of the material without changing the thickness of the
individual sheets?

You can use additives to change the degree of translucency or opacity.
Colloidial silica will make the resin change from clear to white depending
on how much you add. You can also experiment with gel coat pigments. They
add colour as well but the degree of opacity varies. Ditto artist's
pigments. I'm sure there are a lot of other materials you could experiment
with.

These kinds of materials (except the artist's pigments) should be available
from a good supplier of fiberglassing products.

Mike

Where do you get gel coat pigments? I've got a few dings I'd like to fix
without repainting the whole boat.
"Michael Daly" wrote in message
...
On 10-Nov-2004, (Melanie) wrote:

Firstly, onto
which material could I place the fiberglass (with resin mixture) to
dry without it bonding to it?

You can use plastic sheets, but have to be careful which plastic you
choose. Polypropylene and polyethylene will be good, polyester (Mylar)
will stick. Alternatively, you could use a smooth surface that is
coated with a release material like PVA - polyvinyl alcohol (not
polyvinyl acetate).

Secondly, how can I manipulate the
translucency of the material without changing the thickness of the
individual sheets?

You can use additives to change the degree of translucency or opacity.
Colloidial silica will make the resin change from clear to white depending
on how much you add. You can also experiment with gel coat pigments.
They
add colour as well but the degree of opacity varies. Ditto artist's
pigments. I'm sure there are a lot of other materials you could experiment
with.

These kinds of materials (except the artist's pigments) should be
available
from a good supplier of fiberglassing products.

Mike

On 11-Nov-2004, "MMC" wrote:

Where do you get gel coat pigments? I've got a few dings I'd like to fix
without repainting the whole boat.

The same place you get gel coat usually - any decent marine supply shop.

Mike

Yes but gelcoat will not work, it has no wax. What you need is top coat.
Gelcoat is just polyester resin.

Jacques.
www.bateau.com

"Michael Daly" wrote in message ...
On 11-Nov-2004, "MMC" wrote:

Where do you get gel coat pigments? I've got a few dings I'd like to fix
without repainting the whole boat.

The same place you get gel coat usually - any decent marine supply shop.

Mike

Jacques,
My idea is to use West Epoxy with the pigments to fill small chips and
cracks.
MMC
"Jacques" wrote in message
om...
Yes but gelcoat will not work, it has no wax. What you need is top coat.
Gelcoat is just polyester resin.

Jacques.
www.bateau.com

"Michael Daly" wrote in message
...
On 11-Nov-2004, "MMC" wrote:

Where do you get gel coat pigments? I've got a few dings I'd like to
fix
without repainting the whole boat.

The same place you get gel coat usually - any decent marine supply shop.

Mike

MMC wrote:
Jacques,
My idea is to use West Epoxy with the pigments to fill small chips and
cracks.

That will certainly work, but depending on what epoxy you use, the
resulting patch will be somewhat yellow compared to white gelcoat. You
can use white "finish" gelcoat instead, to get a better match. Here's a
link to it:

http://www.westmarine.com/webapp/wcs...oductId=125479

On 12-Nov-2004, (Jacques) wrote:

Yes but gelcoat will not work, it has no wax. What you need is top coat.
Gelcoat is just polyester resin.

For small repairs, you can use gel coat and cover it with release film
until it cures.

Mike

Jacques wrote:
Yes but gelcoat will not work, it has no wax. What you need is top coat.
Gelcoat is just polyester resin.

There's more than one type of gelcoat, specifically there's
"laminating" and "finish" gelcoat. The names accurately describe their
intended function. Laminating gelcoat is used in the mold during the
layup of a hull. Finish gelcoat is used primarily for exterior repairs
and cures properly without needing to be sealed off from the air.