Start playing back your song from the beginning. Open the plugin's GUI and click on the 'W' in the upper right-hand corner.
The Vinyl plugin from iZotope is automatable. Do you have multiple tracks that you want affected during the intro, or is the intro just one track, or are you wanting to apply the effect to a stereo mix? How do I make the FX-Plugin only play up to a certain time? I only want the Vinyl to play during the intro.