I believe your cracks are the result of having your gelcoat too thick, any bending of the mold will crack thick gelcoat.

The best way to fix it is to V out the whole crack and then mix up some of the same gelcoat you used and build it up layer by layer. If you get gravity

on your side fill the crack just barely and put a tightly stretched piece of clear packaging tape down over it. It will flatten things down quite well. Once cured you will have to carefully bd sand the repair down flat and polish. I use 2 or 3 inch pieces of paint sticks.

Another thought. You will wax the mold on your next part anyway so wax will seal the crack. Your part will have a slight crown which is easy to sand down.

Fred

loL

You now owe me a track lap in your carbon fiber Dolomite

Joking... but happy it turned out good.

 



 


    A $1000 electronic device will always protect a 10 cents fuse

Hi Warren,

This is the mould i have made of my roof which i intend to cut off



I havnt made a carbon part as of yet

I hope it does release better than the mould on the car,

Ps

I need some rs 500 carbon bonnet vents

Thanks for the replys ,

Yes good news Joe

I think its going to be a goer

Have filled the cracks with the new black gel coat ,,

Hey daz,

Any good news ?

 



 


    A $1000 electronic device will always protect a 10 cents fuse

i think what joe said was exactly what i always do but before adding the gel coat to the crack u diged i put a normal paint paper tape around the crack so i wouldnt mess arround so i wouldnt need to sand more than i should , if u want something more strong and faster, i put normal epoxy the two that u mix together ,it works and can be sanded and polished too.

also you can add a layer of pva (2 layers) which will result in fast release.

hope this will add an idea. also as joe said this is a way i used not an exact expert how it should be done.

best regards mhd alghoul mhdghoul@hotmail.com youtube channel :atmospherejo link is http://www.youtube.com/user/atmospherejo?ob=0&feature=results_main

As Paul says, its all in the preparation of the mould and as he says using easylease on the mould to make the carbon part has not caused problems with releasing the part.

Perhaps a picture of the full mould may help.

I found on one project i did, I was trying to release from vertical edges which was difficult as it only takes it to be a fraction of a milimeter out on the mould for you to get mechanical lock.

Cheers ,

I have been having a go today joes method hope it turns out ok.

I will have a go with commpressed air next time,

I may have to paint the part now if it comes out the mould dodgey

Ohh well everydays a school day  LOL

Thanks for the replies,

PS What can i do to the mould to make it 100% release my carbon part

i have no8 release wax and easylease is there anything  better than what i have ???