How can I effectively prevent staining on MDF woodwork?

To effectively prevent staining on MDF woodwork, you can apply a sealant or primer before painting or staining the wood. This will create a barrier that helps to protect the MDF from absorbing moisture and other substances that can cause staining. Additionally, you can also avoid placing items directly on the MDF surface that may cause stains, and clean up spills or messes promptly to prevent them from setting in.