How to say “Could I stay in the art room at lunch to finish my painting?” in Japanese

In Japanese

絵(え)を仕上(しあ)げたいので、昼休(ひるやす)みも美術室(びじゅつしつ)にいてもいいですか？

E o shiagetai node, hiruyasumi mo bijutsushitsu ni ite mo ii desu ka?