It dpends. If it all cures but just a tacky surface , he may be able to fix it. If its soft throughout the layer , it has to be striped. Try forcing your thumbnail into it. If its hard and just tacky , recoat. If you can sink into it , yoo should strip it.
Its not nescessarily just pour measuring. Even if you measure correctly but fail to mix thoroughly , you'll have the same problem. You got to mix it a few more minutes than you think. Also , you may ahve a temp problem where you are curing. If the room is like 65 or below , the epoxy takes a long time to cure. Way longer than in a 75 degree room. try moving the rod to somewhere really warm , like 75 to 85 degrees for a few days and see if it cures any more.
If you decide to recoat , be sure you both mix thoroughly and measure accurately.
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