3d printed castable wax resin

Hi there thank you in advance for comments
I’ve never posted before
Here goes I’ve made a 3d printed ring with letters in it. Upon investing I sprayed a product on the model thinking that would help then let fully dry and proceeded to invest. Thinking back I don’t think I tried to impact the investment into the letters just filled the flask.
Letters tried but did not come out? Suggestions pleaseimage image