After UV curing clear resin prints, carefully use a heat gun to completely remove the yellowing that occurs. Left side is the exact same print, but reheated with a heat gun. :
Can I Use A Hair Dryer For Resin Art? - Infarrantly Creative
Hair Dryer vs Heat Gun: Best One for Acrylic Pouring and Resin/Epoxy - Love Acrylic Painting- Official Site