how thick the fiberglass?

in this picture you can se the baot is stern haewy

 

On the boat pictured above, I also firmed up the bilges,"(ounder hull, the boat has strate courners, not runded. It ad flotation to)" which also had the effect of increasing planing surface and I was concerned about too much lift at the stern so I didn't increase the planing surface in the extension but had the boat wanted a little more it would've been easy to fair the extension in with the running surface of a hull.
I would not suggest that you firm up the chines on your boat as that will affect the handling.

 

I hawe troubel tu translate this.
[[ I would not suggest that you firm up the chines on your boat as that will affect the handling ]]

It si this i an not sur abaot [[firm up the chines ]]

 

"ounder hull, the boat has strate courners, not runded." = firm up the chines on your boat

 

no ounder hull on my boat, yast the extenton.

but you can se on the ater pictures, ther is boats whid ounder hull and extentions, and it works fine.

my only consunt is thet the tunnels will make the water go whid the tounls, even when rodren is curved.

 

I hawe start the prodjekt.
this is how i do it.
let the pictures talk!

 

her is moer pictures

 

Not bad! And sufficient access, good.

 

i hawe ad 2 layser of wax and polich it

 

then i ad 2 layser of wax how i not polich of

 

and to day i goth the gelcoat on

 

Hmm, moment please. You did apply the Gelcoat on top of the non polished wax??? And now?

Is that the mould that we see here?

 

yes i did put gelcot on top of thick layer of wax.

it is the muld in the picture

 

I hope it demolds well...

3 options:

-it demolds well. (not likely)
-it will hardly demold (likely), but you can strip the mold from the product. Luckily the mold is a one-time operation, no need to keep it intact.
-add one layer of polyester and mat to the gelcoat, strip that from the mould, add wax and polish it very carefully, and start with new gelcoat.

Please use mold release as it is intended: polished to a high gloss.

And when experimenting: Test on small panels, not on full size and critical objects.

 

the mold is a one tim use only, and its buld to be disabeld in peasis