I’m certain there are lots of choices but I’ve identified alcohol ink or acrylic paint for being the two least complicated methods! Liquor ink is certainly a far more transparent form of shade but acrylic craft paint doesn’t bond beautifully to all kinds of resin this means you’ll should experiment https://introductiontoepoxyresin59360.blogscribble.com/31388959/facts-about-mixing-epoxy-resin-revealed