We’ve created a tool that allows you to view and edit your finishes directly in the game client: The CS2 Workshop Workbench.

To use the workbench, enable the developer console in your game options. From the main menu, open the console by hitting the "~" key. Type "workshop_workbench" and hit enter to pop open the workshop window*.
*We recommend a minimum resolution of 1024x768 in order to accomodate the size of the editor window.