NAILS.INC Biodegradable Glitter in Partying on Portobello Gold. NAILS.INC Biodegradable Glitter in Partying on Portobello Gold. This festive season, make the world a bit more fun with NAILS.INC Biodegradable Glitter. This shimmering nail polish is swirling with metallic biodegradable glitter - there's a sprinkle in every swipe. Use it as a sparkling topper to rich colors or wear alone to coat your nails with light-catching confetti, from tip to toe.. In Portobello Gold - shimmering gold glitter. Biodegradable glitter. Vegan & cruelty-free. 14 ml. Apply one coat of Nails.INC Base Coat (sold separately). Follow with two coats of polish. Finish with Nails.INC's 45 second Top Coat (sold separately) for ultra glossy results. NAIR-WU27. 12717. Founded by Thea Green MBE in 1999, Nails.INC is an award-winning nail brand known for its luxury nail bars & never seen before product innovation. Each and every one of their formulations across nail and beauty have been tried and tested on real humans. They have learned to speak your skin's language, uncomplicate your beauty regime, and understand what you and your nails really need.