If you notice soft, sticky areas in your resin application that do not seem to be curing properly, thisalwaysmeans that the chemical reaction was not able to happen properly—either through unequal measuring or non-thorough mixing. You will have to scrape off any wet material as best you can, sand down any dried, cured resin, and pour another coat over the entire thing. Your artwork underneath will not be disturbed. Make sure you scrape away all non-cured material, otherwise the stickiness could eventually leak out from under the new resin coat. Resin that remains sticky days after being poured will stay sticky indefinitely until measures are taken to fix the situation.