According to the CDC, hydrogen peroxide is a stable, and effective disinfectant against viruses when used on hard, non-porous surfaces. Typically sold in 3% solutions, hydrogen peroxide can be used as is, directly from the bottle. It's best to keep it away from fabrics when cleaning and to wear gloves to protect your hands. After checking the racket, removing strings, removing any overgrip, cleaning the racket, and replacing the OG you can then string the racket. Don’t forget to clean your machine and tools daily. I would not replace OG without checking with client first. Make sure clients are aware of any new policies you may be putting in place to help stop the spread of the coronavirus.
From a biodegradability standpoint, hydrogen peroxide is very desirable, since it breaks down into water and oxygen molecules. Not only does it biodegrade, but it does so quickly. After hydrogen peroxide does its cleaning, whether it’s removing bacteria, mold, dirt, or debris from a substrate, it begins breaking back down to its original building blocks.