I agree with Nancy, get the regular Nature's Miracle. Kaji went on me in the car while I was in the driver seat.
I absorbed as much as I could of the pee and then soaked the seat with the Natures Miracle. I waited 5 mins like the bottle indicates and there is no smell. I have a super sensitive nose and I know if Kaji has had an accident, I can smell it even if I'm standing a few feet away. Yet, in the car there isn't the faintest smell of urine.
As for re-introducing, I suggest you get belly bands. My boy tried to mark my old roomie's couches and the belly bands helped to re-train him. The bands are suppose to catch what little dribble you couldn't stop. It's less stressful for the human, leaves no smell on your furniture, which helps you and your pup be successful. I combined the belly bands, a correction, and keeping an eye on him 100% of the time he was allowed to roam. I literally followed him around the living room and as soon as I saw his little leg lift, I double clapped followed by a stern no, and Kaji put that cute little leg back down immediately. It took a week or two but Kaji started to catch on. He doesn't even try to mark anymore, even when we moved in to a new surrounding for him.