I made wooden chopsticks and don’t know how to do finish coat
Welcome to the Bunnings Workshop community @Ganbaatar. It's marvellous to have you join us, and many thanks for your question about coating chopsticks.You could either use Gilly's 200 ml Food Safe Wax, which will buff to a lovely lustre and sheen with a rag, or you could use Feast Watson 250 ml Kitchen Timber Oil , which will penetrate deeper and likely provide more protection from washing.
Great project, by the way!Please let me know if you have any questions.Mitchell