The Alchemy CU Yoyo Has Metal For The Material. Does Metal Rust And Anyways, Is It A Good Yoyo?
The yoyo should not rust because it is Aluminum. As for the playability, I have no first hand experience. Sorry!
The alchemy cu is actually a stainless steel yoyo, I almost bought one. It is very durable, so much people were using it for 4a