I have an Alico dining room set which I purchased used. The chairs and the table have some decorative molding around the perimeter. On some, but not all, of those chairs, that molding is tacky. I tried cleaning with warm water and Dawn, but no joy. I think the manufacturer did not use the proper resin formula and the resin did not cure properly. Question is, is there some sort of hardener or clear coat I can brush over the molding to harden the surface?

The picture below is shows the decorative molding in question, on the seat back.

Click image for larger version. 

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