New to Silicon Mold Making: Layer of uncured silicon in contact with object.

Hi I am attempting to make a silicon mold of a 3d printed object, the object has been heavily sanded and sprayed with several layers of primer and clear coat to achieve a very shiny surface.

Everything comes out great on the outside except there is a thin layer of silicon in contact with the 3d printed object that does not cure leaving a slimy mess. Is the spray on clear coat causing a reaction with the silicon preventing it from curing? if so is there a specific type of coating I could use on the 3d printed object to keep this from happening?