Swirls and Scratches on Glossy Back Wood Surface

Thank for the responses.

I just checked the Novus, but it says it's for plastic. Does it work for wood too? @ozzy

Novus 1 is still worth a try.

ozzy

Novus is designed for plastics like Lexan and it works great for aircraft windscreens. I'd proceed with caution if trying it on a speaker finish. 

3M Perfect-It products are the best I've used for automotive type finishes which many black speakers have.

To apply 3M Perfect-it, I need to use a buffer polisher, right? Or, Is it possible to apply it by hand?

Guitar makers like Collings use Novus so there's that...nobody makes wood finishes like high end guitar companies, and I was turned on to the stuff by Pat Di Burro of Essex, NH, who has worked on some of my guitars and is considered the premier guitar repair expert in the North East and one of the best in the country (official repair guy for many high end companies). Use the lightest (#1) by hand.