To add finish directly into your design, follow these steps:
Navigate to Global Preferences and Settings, and select the Materials icon.
In the panel that opens, navigate to User-created Materials and select Add.
In the Material Editor window, navigate to Base, set the drop-down value as 'Texture', and select the '+' icon.
Choose a material from your system and upload it.
Make the necessary material specification changes and select 'Create New Material' to upload it.