A couple of ideas concerning the bottom skin. 1. On a multilayer build
up, wet out the underside of the baltek, lay in the glass dry, staple
to underside of baltek and roll out with more epoxy till wet. let set
till tacky, add 2nd layer dry. staple, repeat roll out. etc. or 2.
make up single layer on work bench and let cure, remove blush from
both sides, abrade. Wet out baltek and press panel in place and
support til cured. repeat for succesive layers. Glass tape seams.




On Wed, 05 Jan 2005 03:34:01 GMT, Jim Conlin
wrote:

Brian Whatcott wrote:

On Tue, 4 Jan 2005 17:14:37 -0500, "jimk" wrote:



"Marc" wrote in message
...


I have discovered that I have wet core in several locations on my
cabin top. My limited experience with fiber glass has been with West
System Epoxies and I am comfortable with their use. The bottom skin
has been removed, the wet core excised and the top skin abraded and
prepped for bonding. I intend to wet out the underside of the top skin
and use Baltek Contour Kore AL600/10 to replace the core. After that
cures, I need to build up a bottom skin of at least 3/16". I need a
layup schedule that will give me max strength with the fewest number
of plies. This is a winter project. I will be able to maintain 40* in
the boat and intend on using the fast hardener. All suggestions are
welcome and hints as to technique or alternate methods are
appreciated.


When I did it, I used sticks to prop chunks of core in place overnight
(bonded to the top skin with thickened epoxy).
Then I wet the bottom surface of the core, and pressed the glass cloth in
place relying on the stickiness of the epoxy to hold it in place against the
force of gravity. It worked.

Just be prepared to get dripped on a lot. Work in overlapping sections.
Expect stuff to not always stay in place on the first try. Extra hands would
probably help if you have room.

Good luck.

Jim



...but this method could easily turn into a nightmare. Ask me how I
know....

Brian W



For my money, using vacuum greatly reduces the likelihood of getting a
half-assed job.
Do you feel lucky today?

"Jim Conlin" wrote in message
news:JeJCd.281274$5K2.77429@attbi_s03...

For my money, using vacuum greatly reduces the likelihood of getting a
half-assed job.
Do you feel lucky today

Sure. If you have a vacuum pump - why not?

But if you don't...

Jimk

jimk wrote:

"Jim Conlin" wrote in message


news:JeJCd.281274$5K2.77429@attbi_s03...



For my money, using vacuum greatly reduces the likelihood of getting a


half-assed job.


Do you feel lucky today



Sure. If you have a vacuum pump - why not?

But if you don't...

Jimk



There is generally a good selection on Ebay. Get at least a 1/3 HP
pump. $300 tops.
When you're done, sell it and get your money back.