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Absolutly, its rather simple. Before you layer the 'glass matt or weave (cloth)(prefferably weave) and resin all you would need to do is apply a seperating agent to the serface. A nice thick coat of carnuba wax would be fine. Just coat the hood with a few layers of wax untill the serface looks cloudy or waxy, then lay on your gel coat and layers of weave, after 3-4 layers use an old paint roller with a section of PVC pipe coverd in wax to roll over the layers firmly to squeaze out any air pockets, reapeat if nessasary depeding on if you use weave or matt (thickness). A female mold should be about 13/16"-1/8" thick after the compression for best results so it doesn't flex to much. Let it cure and it should pop right off with little effort.

A seperating agent could be anything from carnuba wax to candle wax to the correct 'glass seperating agent from a 'glass suplier. Its all works well, the wax with come off with a little wax remover paint prep or heat gun. The seperating agents very depending on type, but not very difficult. Pure clear candle wax is the cheapest way($2), you can melt it down let it cool a bit and pour it over, the warmer it is the thinner and smoother it will be. Candle wax can be found at most grocery stores or craft stores in 1lb bricks.

When making your hood from the mold make sure to compress it as well with either the paint roller (best) or a plastic spreader. When using a plastic spread make sure to only use one side of the spreader through the whole thing. If you switch sides mid river you will snag the fabric and have and awfull mess.

If you have anymore questions feel free to ask.

HK
 

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Usually if the wax is topcoated with a gel coat before the resin is applied you'll have no problem. I've made carbon fiber hoods by molding a stock hood in this method 4 times and each time the worst that ever happened was that I got a bit of resin on the inner hood frame and it was a pill to get off.

4Jaw has a few good ideas also, mylar will work well, but it has to be perfect. I personally like candle wax because it cheap, easy and you can reuse it for your files after you scrape it off the hood. As long as the wax is a good coat (cloudy milky appearance) (3layers carnuba, 2 layers of melted candle wax) (let dry between each layer) nothing will harm your paint. The gel coat will act as another layer of protection over the wax because it is non porus and none of the resin will bleed through.

Also 4Jaw is right about the wooden frame to limit flexing, help during unmolding and it also acts as its own table when being filled to create your male peice. If you intend on mking both side of the hood use a gulf ball or marbel on each end between layers (top and bottom)to make sure the mold will line up correctly.

HK
 

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Very nice work. I understand why your doing this again. A flawed mold has to go. No reason to make a flawed hood when you can take another mold and get what'cha want :D It shouldn't harm your paint one bit other than the hassle of removing the wax afterward. Have fun!

HK
 
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