I’m guaranteed there are lots of solutions but I’ve observed Alcoholic beverages ink or acrylic paint for being The 2 easiest options! Alcoholic beverages ink is certainly a more transparent type of shade but acrylic craft paint doesn’t bond perfectly to all types of resin so that you’ll must experiment https://epoxy-resin-art57899.yomoblog.com/37708383/a-simple-key-for-epoxy-resin-applications-unveiled