This video from MIKNSHA9344 appears to show a solo duplication glitch using the GTA Online facility, specifically to transfer permanent Benny's Custom upgrades and F1 Formula wheel markings onto other vehicles. The title suggests the markings "stick" after the dupe, which is a common goal for players looking to customize cars beyond normal limits.
As with any duplication glitch, Rockstar patches these quickly, so this method may already be broken by the time you read this. The video was uploaded for PC, so console players should not expect it to work. Using duplication glitches carries a moderate ban risk, especially if you sell too many duped cars in a short period. Rockstar tracks suspicious activity, and repeat offenders can face account resets or temporary bans.
Before attempting this, check the video's upload date and recent comments to see if players confirm it still works. Glitches are unpredictable, so proceed with caution and at your own risk.
