I contacted aeromarine products http://www.aeromarin...sting-resin.htm
with questions about the casting resin I've been using. So here is the Q & A from the phone call.
Q) My resin lures are sweating, is my resin contaminated?
A) NO, with the increasing warming trend across the nation in the spring, our resins have a tendency to sweat out oils.
Q) This sweating makes it impossible to paint and clear coat a lure, is there anything I can do to alleviate the problem?
A) YES, if you have an oven (they suggested one that you don't use for food) bake the resin at 150F for 4 hours. This should help with the oil sweat.
Q) I've heard that heating isocyanate urethane results in chronic toxicity. Is this true?
A) YES. However, after curing a low heat of 150F is ok.
As a precaution, It is suggested to not do this in your house. If you are doing this your garage have adequate ventilation (open garage door). It is suggested to wear a mask.
Q) Are the gasses released from heating flammable? Is there a risk of combustion?
A) No (I'm personally going to use a tray to capture oils sweating out).
Just figured I would report what I was told.