Activate The Last Ride's crew ability by tapping a creature with power 2 or greater, causing it to become an artifact creature until end of turn.
The Last Ride dies as a state-based action due to having 0 or less toughness, triggering Salvaging Station and Gutter Grime.
Resolve the Gutter Grime trigger, creating a creature token.
Resolve the Salvaging Station trigger, untapping it.
Activate Salvaging Station by tapping it, returning The Last Ride from your graveyard to the battlefield.
Repeat.
By turning The Last Ride into an artifact creature via its crew ability, you intentionally push its toughness to zero or less by leveraging its own life-reducing draw engine to instantly send it to the graveyard. This tragic demise triggers Salvaging Station—which conveniently untaps whenever any creature dies—allowing the Station to pluck The Last Ride right back out of the graveyard and onto the battlefield. Meanwhile, Gutter Grime watches the carnage unfold, growing larger with each death and churning out a steadily escalating army of Ooze tokens.