Apparently you applied an unwaxed polyester resin. The air is inhibiting the cure. If you had mixed in 5% styrene wax in the wet resin, the wax would have risen to the surface and shielded it from the air, allowing a full cure. The thickness of the resin layer is not important. You might be able to coat the stock with styrene wax now and allow it to cure. The other possibility is to expose the stock to a high temp. environment to accelerate the cure. You might put it in your attic for a few days and see if that does it. You can buy styrene wax here: http://www.fibreglast.com/product/St...lyester_Resins
There is also a wealth of info on the site that might help you in the future.
RWO
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